Imágenes de páginas
PDF
EPUB

practice which exposes those who partake of the diseased meat to when 2.15 inches were registered. There have been but nine such obvious risks of infection.

cloudless days in the same month, while nineteen were partly Cooling of the Body BY SPRAY. – Dr. S. Placzek, follow cloudy. The mean temperature has been somewhat above that of ing up some laboratory experiments by Preyer and Flashaar on the

the past decade. Fog - a condition hitherto almost unknown in effect of spraying a considerable part of the body surface of ani

Colorado --- occurred during five mornings in October. mals with cold water, has applied the spray for the purpose of re- Care of the Teeth. - At the meeting in Berlin last spring, ducing febrile temperatures in human beings. In the case of a of the German Association of American Dentists, the best means man suffering from phthisis, whose temperature was high, he found, of preserving the teeth were discussed, and Dr. Richter of Breslau that, by spraying about a pint of water at between 60° and 70° F. said, “We know that the whole method of correctly caring for over his body, the temperature fell to normal, and continued so for the teeth can be expressed in two words, brush, soap. In these several hours. Again, a similar method was satisfactorily applied two things we have all that is needful for the preservation of the in the case of a girl with diphtheria. In the healthy human sub teeth. All the preparations not containing soap are not to be recject, according to the Lancet, the spray lowered the temperature ommended ; and if they contain soap, all other ingredients are nearly two degrees, and, in animals which had been put into a useless except for the purpose of making their taste agreeable. condition of septic pyrexia by injections of bacteria, the tempera. Among the soaps, the white castile soap of the English market is ture was reduced to normal by the spray. By keeping healthy especially to be recommended. A shower of tooth preparations has guinea-pigs and rabbits some hours under spray, and using from been thrown on the market, but very few of which are to be rechalf a pint to a pint of water at the temperature of the room (44°ommended. Testing the composition of them, we find that about to 62°), the temperature of the animals fell several degrees.

90 per cent are not only unsuitable for their purpose, but that the DEATH BY ELECTRICITY. — At the meeting of the Medico greater part are actually harmful. All the preparations containing Legal Society held in this city Nov. 20. Dr. Phillip E. Donlin. salicylic acid are, as the investigations of Fernier have shown, dedeputy coroner, who read a paper on “ The Pathology of Death bystructive of the teeth. He who will unceasingly preach to his Electricity,” in the course of which he said, “The popular idea patients to brush their teeth carefully shortly before bedtime, as a that the electrical current passes along the nerves and produces cleansing material to use castile soap, as a mouth wash a solution of shock by conducting the current to the brain, is, as you know, fal- oil of peppermint in water, and to cleanse the spaces between the lacious. Our knowledge of the great-electrical conductive power teeth by careful use of a silken thread, will help them in preservof water, and the experiments of Dr. Richardson, which show the ing their teeth, and will win the gratitude and good words of the still greater electrical conductive power of blood, would lead one public.' to suppose --- and, in fact, it is proved by the greater damage done THE DIGESTIBILITY OF BOILED MILK. – Though the impor. to the most vascular organs of the body – that the blood is the tance of sterilizing milk for bottle-fed infants in cities has been great conductor of electricity; and that in all cases of exposure to proven beyond a doubt, the process seems to have some disadvanthe electric current the blood is the first to suffer, and the nerve tages. In a recent number of the Zeitschrift für physiologische centres and cells the last. Unquestionably our knowledge of the Chemie, Dr. Randnitz publishes some striking experiments on the manner of death points out clearly, that, when death is not on the subject. He shows by analysis of the milk ingested, and of the moment produced by the shock of the current, it must be produced fæces and urine, that much less nitrogenous material is abstracted by the electric current's action (conducted by the blood) upon the from boiled than from unboiled milk. If 156 grams of nitrogen in ganglia of the heart, causing spasm of the heart muscle, emptying the forın of unboiled milk were given to dogs for three days, analythe ventricles, and abnormally forcibly propelling the charged and sis showed that 9.4 per cent was stored in the tissues of the animal. fluid blood to the periphery, producing hyperæmic ecchymosis in On the other hand, with the same amount of nitrogen in boiled whe most vascular portions of the most vascular organs. Where milk, but 5.7 per cent was assimilated. If these results are condeath is not instantaneous, it must be produced by disorgan- firmed, it is evident that an infant must need a larger quantity of ization of the blood, interference with the circulation causing sterilized than of raw milk. engorgement of some vital vascular organ. The lungs being ARTIFICIAL FOOD FOR INFANTS. - Dr. Escherich of Munich the most vascular, death usually results from asphyxia either

gave a lecture in the pædiatric section of the sixty-second meeting through the unoxygenated condition of the blood, or hyperæmia

of German naturalists and physicians at Heidelberg, advocating a of these organs." In reply to a question as to the effect

reform in the artificial feeding of infants. He bases his belief in likely to be produced by the infliction of the death penalty

the necessity of such a reform on the errors produced by Biedert's by electricity, Dr. Donlin said that the immensity of the power of

theory, which depends upon the difference between cow's milk and the machines constructed was such that the purely mechanical re

normal human milk. Biedert's view was, as stated in the Lancet, sult would occasion death. It was possible with those appliances

that all the troubles and diseases occurring in artificially fed infants to drive the current of electricity through the tissues with such

were due to the indigestion of the caseine of the cow's milk, causing power as to destroy them, though the amount of power to be em

irritation of the mucous membrane of the bowels. He therefore ployed was clearly within the control of the electrician.

considered, that, if the latter were diluted so as to contain one per Is COLORADO's CLIMATE CHANGING? — The inhabitants of cent only of caseine, the infant could not possibly take an injurious Denver are asking what is the meaning of the unusual snow-fall quantity of this noxious substance. Dr. Escherich considers that and humidity of the past month. The newspapers of that city, as this theory, and the practice resulting from it, have gone far to prewe learn from Medical News, have expressed the opinion that vent due care being exercised as to much more important conditheir climate is about to undergo a change, in consequence of sur. tions. Such are, according to the lecturer, germs and fermentation face changes of "building up” and improving the State. The in improperly kept cow's milk, the number of meals, and the quanpresent moist season has been especially disappointing to Eastern tity of food given at a time in proportion to the capacity of the inpeople, who have journeyed to Denver to escape the humidity of fantile stomach, the total quantity of nutritious matter and its proour seaboard winters. Froin a lettet recently received, a few sen- portion in the food, and finally the injurious effect which the water tences are quoted : “Snow has fallen each night and morning, but which has been added to the food has on the digestion and the the sun conquers by mid-day, making walking almost impossible. metamorphosis of nutritious matter. Dr. Escherich holds it, above As a usual thing, the inhabitants expect about ten days of inclem- all, necessary to return to physiological principles, and so to apent weather during winter and spring, and have not looked upon proximate artificial feeding as much as possible to the mother's the paving of streets and crossings as at all necessary. But they milk, as regards the absence of germs and the number and quantiare now aroused to remedy this condition. The snow.fall is said ties of meals. The lecturer then pointed out that it is easy enough, by some to be already greater than the total for three ordinary by sterilization of small quantities of milk according to Soxhlet's winters." The total fall at the Denver station, in October, was plan, to comply at least theoretically with all these conditions, and 2.11 inches, and is the only October since 1871 when 1.49 inches at the same time to limit the quantity of caseine so as to fulfil Biehave been exceeded, with the single exception of that of 1877, dert's requirements.

NOTES AND NEWS. The eighth congress of Russian naturalists and physicians will be held at St. Petersburg from Dec. 27, 1889, to Jan. 7, 1890.

- There are now thirty-nine crematories in various parts of the world. Italy has twenty-three ; America has ten ; while England, Germany, France, Switzerland, Denmark, and Sweden have one apiece. In Italy there were two cremations in 1876: the number rose to fifteen in 1877, and in 1888 the number was 226. Since 1876, 1,177 cremations have taken place in Italy, while the combined numbers in all other countries brings the total only to 1,269.

- The following is a list of the papers read at the meeting of the Royal Meteorological Society, London, Nov. 20: “Second Report of the Thunder-Storm Committee," being a discussion by Mr. Marriott on the distribution of days of thunder-storms over England and Wales during the seventeen years 1871-87; “On the Change of Temperaiure which accompanies Thunder Storms in Southern England," by Mr. G. M. Whipple ; “ Note on the Appearance of St. Elmo's Fire at Walton on the Naze, Sept. 3. 1889." by Mr. W. H. Dines ; “Notes on Cirrus Formation," by Mr. H. Helm Clayton, who has made a special study of cloud-forms and their changes; “A Comparison between the Jordan and the Campbell Stokes Sunshine Recorder," by Mr. F. C. Bayard, being the result of a year's comparison between these two instruments; “Sunshine," by Mr. A. B. MacDowall, being a discussion of the hours of sunshine recorded at the stations of the Royal Meteoro. logical Society ; “On Climatological Observations at Ballyboley, County Antrim," by Professor S. A. Hill, the result of observations made during the five years 1884-88.

- A circular letter has been sent to the members of the National Electric Light Association by the secretary. Mr. Allan V. Garratt. asking them to state to him as briefly as possible the most difficult electrical problems they meet in their investigations or in the conduct of their electrical business. They are also requested to state what feature of their business is the least economical or efficient, and why, and where the greatest economy could be effected if the difficulty could be overcome. The answers to these queries will be digested, and the results submitted to Professor Henry A. Rowland of Johns Hopkins University. Professor Rowland has consented to address the next electric-light convention at Kansas City in February, basing his remarks upon the problems suggested by the members, and pointing out the direction in which their solution must be sought.

- From a memorandum appended to the last report of the United States consul at Shanghai, it appears that the greatest silk producing province in China is Che Kiang, and Kiang-Su comes second. The two great divisions in silk as exported from central China are known in all places of consumption as tsatlees and tay. saams. Tsatlee is simply the Cantonese for tseih le (or “seven li"); that is to say, an area of that dimension, taking Nanzing as the centre, where the best fine-sized silk was formerly produced. The radius has been extended, in consequence of the higher price paid for fine compared with coarse sorts ; and tsatlees now include some silks reeled from Sinsze and Seloo cocoons, which formerly were only employed for silks of the coarser thread. Considerable quantities of taysaains are still, however, being reeled in the two last-named districts. At the present time tsatlee means silk produced at Nanzing, Chinza, Linglooh, Shwangling, Woochin, Leensze, Hoochow, and a portion of Sinsze and Seloo, besides the intermediate towns, all situated in Che-Kiang. Taysaam (mean ing "a big worm ") has really only the signification of silks of a coarse reeling, and under the denomination are classed silks from Kiahsing, Sinsze, Dongse, Shaouhing, Woosieh, and Laeyang, the last two districts being situated in Kiang-Su. Haining or Yuenfa, situate in Che. Kiang, produces silk reeled of the finest size known in China ; and when native competition was crippled by the TaiPing rebellion, large quantities annually found a ready sale in Europe. Of late years, however, the export has dwindled down to almost nothing. Hang-Chow, also Che-Kiang, produces both fine and coarse sized silks, tsatlees and taysaams, the size of the former from this district very nearly approaching to that of Kiahsing taysaams, and they are generally in favor both for export and for home use, while the coarse sorts are mostly taken by Chinese.

Shaouhing, in Che-Kiang, produces a very considerable quantity of silk, that, when reeled on foreign methods, is said to be equal to any in the empire, but which, as natives persist in reeling on a large wheel and without care, has gradually lost all interest to foreigners. Laehang, in Kiang.Su, produces from 3.000 to 4,000 bales annually, but the same remarks as those applied to the Shaouhing produclion must apply also to this district's production. The principal towns where throwing is carried on are Nanking. Soo-Chow, and towns Hang-Chow, and the business must be large to meet the requirements of the enormous piece-goods trade of China. Formerly foreigners used to export considerable quantities; but the improvements made in Europe which have not extended to China have extinguished the trade. The re-reeling of silks (for the purpose of rendering the manipulation of the silk easier to manusacture) is carried on in the centres of Nanzing and Chinza, and the outlying farms and hamlets. The production is considerable, and would be larger, it is said, if the Chinese would use greater care and abstain from adulterating the silk during the process.

- In response to a despatch from Emin Pacha, doubtless sent on to Zanzibar in advance of the main party, and thence cabled to Cairo, the Egyptian government steamer “Mansourah " has been sent to meet Stanley and Emin and their party at Zanzibar. This will hasten Stanley's return to Europe, and the completion of his adventurous three-years' task may be chronicled very soon. A long letter from Stanley to a friend, dated September, 1888, has just been published. It records his discoveries, and recounts the difficulties anticipated on his homeward journey. There is an account of the hostility of the King of the Kabburega, who stripped Casati, and turned him adrift to perish. He was fortunately found and rescued by Emin. Another letter gives a full account of his sojourn with Emin.

– The Lancet, commenting on the passage of the English infectious disease notification bill, says, : One thing is remarkable in this legislation, — the slight resistance which politicians of advanced views have been able to offer to its fundamental principle ; viz., the right of the community to insist on knowing the affairs of individuals and families where these are likely to involve in any degree the health of others: in other words, the subordination of the individual to the community. This is, of course, the fundamental principle of society, but it is ever undergoing fresh development. National education, vaccination, isolation, and notification of disease, are all illustrations of the same principle. We have ourselves no hesitation in accepting the principle ihat individual liberty must give way where such doubtful advantages as the freedom to have small-pox and scarlet-fever are the only badges of liberty ; anci it will involve no misfortune to the world if many other rights claimed by well-meaning but discordant individuals are curtailed in the interests of society."

– The New York Electrical Society, the oldest body of the kind in the country, is the Electrical Section of the American Institute. The object of the society is to bring before its members such topics and new inventions as merit their study and attention. There is a large and rapidly growing class of those who wish to gain a greater familiarity with electricity, and it is to the education of this class that the society directs its work. There is another class, composed of those who, while not earning a livelihood from electrical work, are greatly interested in all the developments of electricity, and who are glad to attend the meetings of the society, because they there are given the opportunity to come into contact with practical electricians, from whom they may elicit instruction and information such as no book could impart. The appreciation of the work of the society in connection with this element of the community is shown by the growing attendance at the meetings, and by the readiness of the press to publish reports of the proceedings. During the present season the society will introduce to its members a number of the leading men in the electrical profession, who will handle the subjects with which they are most familiar, and of which they are acknowledged masters. From such a course of papers and lectures as has been arranged, there can be no doubt that a great stimulus will be given to the study and application of electricity in New York ; and the society therefore confidently appeals to those in any way interested in electricity for all the support

that they can give. Among the papers and lectures already read nearer to the original type of the Sumatrans than to the Malays this season are "Electrical Exhibitions, and a Description of Recent just mentioned. They show, therefore, less mixture with Indian, Electrical Developments in Europe,” and “How to test Electric but, on the other hand, more mixture with Chinese, blood; and the Motors." Among those yet to come are “ Progress of Electric . Javanese more so than the Sundanese. Railroads,” “A Talk on Cables,” “The Electrical Torpedo, - - A London paper says that some experiments in judging disNew York's Sole Defence," "Storage-Batteries," “ The Incandes

tance by sound were carried out recently by one of the London cent Lamp," “ The Telegraph," “ The Telephone," " The Alternat

brigades of the Metropolitan Volunteers. This branch of military ing Current," " The Galvanometer and its Uses," "Electricity in

tactics is quite a new departure. It was first explained to the men War," “ Phantom Wires,” “How to run an Electric-Light Sta

that sound travels at the rate of 1,100 yards in three seconds, and tion," "Transformers,” “Power Transmission," " Laboratory

on this basis they were to estimate the distance at which some Manipulations." “ The Social Side of the Electric Street Railway,"

rifles were being discharged in the darkness. The answers at first “ The Solution of Every-day Electrical Problems,” and “The

were very wide of the mark, some of the men being as much as Progress of the Year." . The officers of the society are as follows::

150 yards out in their calculations. With a little practice, however, president, Francis B. Crocker ; vice-presidents, Joseph Wetzler,

a great improvement was shown, many of the men guessing the Francis Forbes, and Dr. Otto A. Moses; secretary, George H.

distance exactly. The experiments are not as satisfactory as was Guy; treasurer, H. A. Sinclair ; trustees, J. M. Pendleton, C. 0.

hoped, and it is thought some time must elapse before judging Mailloux, and A. A. Knudson.

distance by sound can be relied upon with any certainty. – It is well known, says Nature, that whales can remain a long

- At the monthly meeting of the Royal Society of Tasmania on time under water, but exact data as to the time have been rather

Sept. 9, the president (his Excellency Sir Robert G. C. Hamilton) lacking. In his northern travels, Dr. Kückenthal of Jena recently

said he desired to bring before the society a matter relating to the observed that a harpooned white whale continued under water

young salmon at the Salmon Ponds. These were the undoubted forty-five minutes.

product of the ova brought out by Sir Thomas Brady, which had - For determination of the air temperature at great heights, the been stripped from the male and female fish and artificially fertiBerlin Society for Ballooning, we learn from Humboldt, is going to lized, and the utmost care had been taken to keep them apart try a method of Herr Siegsfeld, who uses a thermometer, which, from any other fish bred in the ponds. He recently visited the by closure of an electric circuit when certain temperatures are ponds, accompanied by the chairman of the Fisheries Board, the reached, gives a light-signal. Small balloons, each containing such secretary, and two of the members, when they carefully examined a thermometer, will be sent up by night; and the light will affect a number of the young salmon, among which they were surprised photographically a so-called "phototheodolite," while the height to find marked differences existing, not only in size, but in their then attained will be indicated in a mechanical way. It is hoped characteristics. It has often been held, according to Nature, that that more exact formulæ for the decrease of temperature with the Salmonidæ caught in Tasmanian waters cannot be true Salmo height may thus be obtained.

salar, because so many of them have spots on the dorsal fin, and – From the Journal of the Anthropological Society in Vienna,

a tinge of yellow or orange on the adipose fin; but nearly half of we take the following conclusions of Dr. B. Hagen, respecting the the young salmon they examined, which had never left the ponds, Malay peoples : Their great predilection for the sea, which makes

had these characteristics. Again, many of them were alınost "bullthem pray to Allah that they may die on sea, seems to render the

headed " in appearance, - another characteristic which is not supMalay race adapted for the Polynesian and Further Indian Archi

posed to distinguish the true Salino salar. He would suggest to pelago. The centre from which they migrated is to be sought in

the chairman of the Fisheries Board, whom he saw present, that the highlands of West Sumatra, particularly in the old kingdom of

the secretary should be asked to make a formal report of the result Menang-Kabau. Thence the peoples extended slowly eastwards,

of this visit, and to obtain some specimens of the young fish, which - at first probably the races now to be found only in the interior

could be preserved in spirits, and perhaps sent to Sir Thomas of the great islands (the Battas in Sumatra, the Sundanese in lava. Brady to be submitted for the consideration and opinion of natuthe Dayaks in Borneo, the Alfurus in Celebes, etc.). These “abori

ralists at home. gines” of the islands crushed out a population already in posses – British Consul Pettus of Ningpo, in his last report, says that sion, as remains of which the Negritos may be taken. The Malays one of the principal and perhaps most profitable industries of his in the narrower sense, occupying Sumatra, Malacca, and North consular district is the ming fu or cuttlefish trade. For two Borneo, are to be regarded as the last emigration from the centre months, from the latter part of April until the closing days of June, referred to, occurring from the twelfth to the fifteenth century, the number of small and somewhat barren islands of the Chusan A.D. With the Indians and Chinese, who have been long in inter- archipelago, situated within a radius of fifty miles of Chinhae (at course with the archipelago, arose mixtures and crosses, in less the mouth of the Yung River). swarm with men engaged in the measure also with the Arabs. One must not therefore expect the occupations of cleaning and drying the fish for the Ningpo market, pure racial type, especially in the coast population. The crania of and the adjacent waters are covered with boats engaged in fishing. the anthropological collections are too imperfectly determined in The cuttlefish boats are from twenty-five feet to thirty feet in respect of their locale to be of any service for a judgment of the length, with a beam of seven feet. They are furnished with a Malay peoples. Of more value are the measurements of the living single lug-sail, usually made of foreign cloths tanned with manbegun by Dr. Weisbach and executed by Dr. Hagen, in four hun- grove-bark. They are worked with two, sometimes three, oars, dred cases. The latter's conclusions are: (1) The peoples in the with which the boats are propelled with immense speed. The interior of Sumatra - the Battas, the Allas, and the Malays of boats, as a rule, work in pairs, a bamboo fastened at the bows of Menang-Kabau - compose a closely allied group always in direct each to keep them separated, with a space of about twenty feet contrast with the hither-Indian peoples, and yet showing just as between. To the bamboo is attached the large net. Others, little community with the Chinese. We must therefore take them again, catch the fish by means of a square net, fastened at the for the pure original type, characterizable as follows : small, com- corners to the ends of two slender bamboos which cross at right pact, vigorous figure, of less than 1,600 millimetres average size : angles, and sewn together in the middle. These bamboos, with long arms; very short legs ; very long and broad mesocephalous the attached net, are suspended from a stout beam which projects skull of very great compass, with high forehead; a prognathous some distance over the bow, and has fastened to the inboard end face to per cent broader than long, with large mouth, and uncom- a heavy weight for facilitating the raising of the net. This is used monly short, flat, and broad nose with large round nostrils opening in shallow water, and principally at night, when a fire is kept burnmostly frontwise, and with broad nasal root. (2) The Malays ofing in a pan in the bow of the boat to attract the fish. One or the east coast of Sumatra and those of the coasts of Malacca indi. two men attend to the working of this net, while the rest of the cate a much greater affinity to the Indians than to their tribal crew are employed in scooping in the fish with hand-nets. The peoples of Menang-Kabau. They are plainly, therefore, thoroughly fish are then landed, cleaned, and sun-dried, the latter operation mixed with Indian blood. (3) The Javanese peoples stand much taking about three days. The cuttlefish is called by the Chinese

uri tsê ("black thief "): ming fu is the commercial name of the fish when dried. The black liquid secreted by the fish was used as a substitute for ink, but was abandoned, as it faded after a lapse of a few years.

- Many late and valuable reports of ocean-currents have been received at the United States Hydrographic Office, but lack of space forbids any extended reference to them. The graphic record of the tracks of derelicts, wrecks, buoys adrift, etc., published each month on the " Pilot Chart.” is itself instructive as to the general set of currents, especially in the case of a large iron buoy like that from Port Royal, S.C. Attention is called, alsu, to the “bottle papers” issued by the Hydrographic Office, for masters of vessels to seal up in empty bottles and throw overboard, in order, that, when found and returned, data may be obtained regarding the general drift of surface currents. This is an old plan, but one that is still used, and is thought to give results of some value when a large number of such facts are available for study. Many of these papers have been returned to that office, and the latest may be mentioned here. One was thrown overboard Dec. 30, 1888, by Chief Officer Downie (British steamship“ Crown Prince") off the north-west coast of Cuba: it was picked up on the beach at Matagorda Island, Texas, Aug. 10, 1889, by the keeper of the Saluria life-saving station. Another was thrown overboard March 27, 1889, by First Officer Conklin (American steamship“ Cherokee ") in latitude 360 42' north, longitude 75° 06' west : it was picked up on Sept. 25 by Capt. Touguerant (French brig“ Bonne Joséphine") in latitude 44° 30' north, longitude 52° 10' west. The forms issued for this purpose are printed in six languages, and efforts are being made to give them a wide distribution.

– A lake-dwelling has been discovered in the neighborhood of Somma Lombardo, north-west of Milan, through the draining of the large turf moor of La Lagozza. The Berlin correspondent of the Standard, who gives an account of the discovery, says that this “ relic of civilization " was found under the peat-bog and the underlying layer of mud, the former being i metre in thickness, and the latter 35 centimetres. The building was rectangular, 80 metres long and 30 metres broad; and between the posts, which are still standing upright, lay beams and half-burnt planks, the latter, having been made by splitting the trees, and without using a saw. Some trunks still retain the stumps of their lateral projecting branches, and they have probably served the purpose of ladders.

ve probably served the purpose of ladders. The lower end of these posts, which have been driven into the clay soil, is more or less pointed, and it can be seen from the partly still well-preserved bark that the beams and planks are of white birch, pine, fir, and larch. Among other things, were found polished stone hatchets, a few arrow-heads, Aint knives, and unworked stones with traces of the action of fire.

- According to recent work of Professor H. W. Wiley, the chemist of the United States Department of Agriculture, the value of sorghum-seed as a food for man and other animals is fully equal to that of maize and oats, and but little inferior to that of wheat. The essential constituents of the cereals as food are the albuminoids and the carbohydrates. Comparing these two constituents of sorghum-seed with the other great cereals, it contains more albuminoids than either unhulled oats or maize, and only about three-fourths of a per cent less than wheat. Its contents of carbohydrates is al. most identical with that of the other cereals mentioned. The glumes of the sorghum-seeds contain a coloring-matter of great intensity, and it has been thought that this substance might prove injurious to the health of animals consuming it. Professor Wiley has therefore had a careful examination made of the properties of this coloring-matter, and finds it to be a vegetable coloring-matter without noxious principles, and, as far as the investigations have extended, wholly free from tannin. This study includes only the chemical re-actions of the color, and the characteristics which distinguish it from other companion colors of a vegetable origin. Owing to the small quantity of pure color obtained, and the difficulties of complete purification, no experiments were made with regard to its dyeing qualities. The richness of the color (a deep red) would certainly point to the desirability of such experiments. In the heavier and larger hulled seeds, such as those of Deutcher's Hybrid, Early Tennessee, and the Early Amber varieties, the color

seems to constitute between five and fifteen per cent of the alcoholic extract, which latter ranges from five to ten per cent of the seed. The yield of cane per acre appears to average from ten to twelve tons; and the seed-head, fifteen to twenty per cent of the cane. Assuming the seed to constitute seventy-five per cent of the head, we have three hundred pounds of seed to the ton of cane. This affords thirty pounds of extract, and three pounds of pure color, to the ton of cane, or thirty pounds per average acre. The higher the tonnage, and the darker and heavier the hull of the seed, the greater the yield of color:

– A curious instance of the vicissitudes of commerce is afforded by the change going on in the raisin trade between this country and Spain. In 1882 Malaga shipped to this country nearly a million boxes of raisins, which was about half its production for that year. Since that time the annual production in Malaga has steadily decreased, while that of California has as steadily increased, till in 1888, out of a total crop of 112,000 boxes, Malaga sent us only 700,000 boxes. It is now predicted by vine-growers that in a few years California will be shipping raisins to Spain.

- Iron buoys, being constructed so as to withstand the buffetings of the heaviest seas, are apt to remain long afloat when once they get adrift from their moorings. Although their movements are then governed by the combined influence of wind and current, the relative effects of each of these components of the force acting upon them vary more or less, according to the shape and immersion of the buoy. When a considerable portion of the moorings are still attached, the immersion is generally so great that the influence of the current largely outweighs that of the winds, and the drift of the buoy is a very fair indicator of the set of the current it has experienced. · A notable instance is afforded by the mid-channel buoy from Port Royal, S.C., which went adrift in the latter part of November, 1886, and is still floating about in the North Atlantic, probably somewhere between the parallels of 35o and 45° north, and the meridians of 45° and 55° west. Eleven reports have been received thus far by the United States Hydrographic Office.

– The following is a list of the Saturday morning lectures to be given in the Law School building of Columbia College during the season of 1889-90: Nov. 16, “ The Influence of Locality in American Fiction,” by L. J. B. Lincoln, Esq.; Nov. 23. “ Petroleum and Natural Gas" (with illustrations), by Dr. John S. Newberry; Nov. 30, “Cæsar and Cleopatra,” by John William Weidemeyer, Esq. ; Dec. 7. “ Benjamin Franklin, America's Practical Philosopher," by Dr. Henry M. Leipziger : Dec. 14. “ The Avesta and the Religion of Zoroaster." by Dr. A. V. W. Jackson ; Dec. 21, “The Geological History of Man" (with illustrations), by Dr. John S. Newberry: Dec. 28. - The Relation of the Higher Education of Women to Literature in America,” by L. J. B. Lincoln, Esq.; Jan. 4, 1890, “Shakspeare and Corneille," by Professor Adolphe Cohn; Jan. 11, “The Cyclades," by Dr. Louis Dyer; Jan. 18, “ The Career of Leon Gambetta," by Professor Adolphe Cohn; Jan. 25. “ Progress of Education in the United States," by Dr. Henry M. Leipziger ; Feb. 1, “ Total Solar Eclipses and What We learn from Them" (with illustrations), by Professor J. K. Rees; Feb. 8, “Where and How We remember," by Dr. M. Allen Starr; Feb. 15. “The Moon: A Study of her Surface" (with illustrations), by Professor J. K. Rees; Feb. 22, “Methods of teaching French," by Dr. B. O'Connor; March 1, “ Emerson as an English Writer," by Professor T. W. Hunt; March 8, “ Methods of Education,” by Dr. B. O'Connor ; March 15. “Words and their Abuse ; from Philologi. cal, Rhetorical, and Moral View-Points," by Dr. J. D. Quackenbos; March 22, “The Poetic Edda," by Professor Charles Sprague Smith ; March 29, the same subject continued ; April 5, “Swinburne and the Later Lyrists,” by Professor H. H. Boyesen ; April 12, “ George Eliot and the English Novel,” by Professor H. H. Boyesen ; April 19, “ Shakspeare's Dramatic Construction: The Winter's Tale," by Professor T. R. Price; April 26, “Shakspeare's Verse Construction,” by Professor T. R. Price; May 3, “Athenian Days," by Professor A. C. Merriam ; May 10, “The Geographical Distribution of North American Plants" (illustrated by lantern projections), by Dr. N. L. Brition : May 17, “ Daniel O'Connell," by Dr. William A. Dunning; May 24, “ Shop-Girls and their Wages," by Dr. J. H. Hyslop.

SCIENCE:
A WEEKLY NEWSPAPER OF ALL THE ARTS AND SCIENCES.

PUBLISHED BY
N. D. C. HODGES.

47 LAFAYETTE Place, New York.

me the favor of analyzing this butter, I shall send more samples from the same cows on the same feed. We hope in the near future to follow up these analyses with complete analyses of butter from different feeds, feeding two cows on cottonseed, and then changing them to other feed."

The samples sent by Mr. Harrington were small, and a complete analysis could not be made; but the results obtained are of such interest that I will communicate them at the present time, and call attention to the peculiarities noticed.

Butter

Butter from

from Cotton eed. Other Feed.

SUBSCRIPTIONS.- United States and Canada....................$3.50 a year.'

Great Britain and Europe. .................... 4.50 a year. Communications will be welcomed from any quarter. Abstracts of scientific papers are solicited, and twenty copies of the issue containing such will be mailed the author on request in advance Rejected inanuscripts will be returned to the authors only when the requisite amount of postage accompanies the manuscript. Whatever is intended for insertion must be authenticated by the name and address of the writer ; not necessarily for publication, but as a guaranty of good faith. We do not hold our. selves responsible for any view or opinions expressed in the communications of our correspondents.

Attention is called to the “ Wants" column. All are invited to use it in soliciting intormation or seeking new positions. The name and address of applicants should be given in full, so that answers will go direct to them. The " Exchange "column is likewise open.

[merged small][merged small][merged small][ocr errors][merged small][merged small][merged small]
[blocks in formation]

CONTENTS: The Forward GAS-ENGINE ....... 379 INFLUENCE OF Food, Animal Idio. A DANGEROUS Insect Pest in MED

SYNCRASY, AND BREED ON THE

COMPOSITION OF BUTTER........ 388 FORD, Mass ............... .. · 381

THE Sting of the Jelly-Fish..... 390 ELECTRICAL News.

MENTAL SCIENCE. Specific Inductive Capacity ........ 382 The Energy and Rapidity of VolunElectric Lighting at Berlin ........ 33 tary Movements................ 390 Electrical Sunstroke ........... 38's Rapidity of Moveme its........... 391 The Houstholm Electric Light Book-Reviews.

house ......... ............... 383 A Treatise on Linear Differential Electrification due to Contact of

Equations .......... .......... 391 Gases with Liquids ... ........ 383 AMONG THE PUBLISHERS........... 392 Health Matters.

LETTERS TO THE EDITOR. Salt and Microbes.... ...... ... ... 383

282 Intelligence of Ants

Fas. Lewis Howe 394 Cooling of the Body by Spray .....

Galton's Bodily Efficiency Diagram Death by Electricity .............

and the Marking System Is Colorado's Climate Changing ?.. 384

Arthur E. Bostwick 394 Care of the Teeth... ... ... ....

Cave-Air for Ventilation

W. H. Leonard 395 The Digestibility of Boiled Milk...

INDUSTRIAL Notes. Artificial Food for Infants ........ 384

Elektron Manufacturing Company. 395 NOTES AND News................... 385 Electrical Accumulators........... 395

INFLUENCE OF FOOD, ANIMAL IDIOSYNCRASY, AND

BREED ON THE COMPOSITION OF BUTTER.' ONE of the fundamental principles of dairying is regard for the influence which the care of the animal, supervision of the milking, separation of the cream, ripening of the cream, churning and washing, have on the quality of butter for table use. These processes also, together with the method of packing, have a notable influence upon the preservation of the butter in a sweet state. The discussion of the above problems, however, is a thing for the practical dairyman rather than the chemist. The chemical composition of buiter-fat, as influenced by the character of food received by the animal, the race of the animal, and the peculiarities of the animal, has hitherto been little studied from a chemical point of view. To the latter subject I propose to devote the following paper.

Late in February this year, I received a letter from Professor H. H. Harrington, chemist of the Experimental Station of Texas, accompanied by two samples of butter, which he asked me to examine. The following extract from Professor Harrington's letter will indicate the motive which led him to send the samples: –

"Some work in our laboratory ir:dicates that volatile acids from the cottonseed butter are much lower than has been generally sup. posed. I send two samples of butter, - one from coitonseed seed, and the other from feed containing no cottonseed. If you can do

1 Abstract of a paper by H. W. Wiley, read before the Society for the Promotion of Agricultural Science at its annual meeting held in Toronto, Canada, Aug. 26, 27, 1889.

The most remarkable points connected with the analyses are as follows: 1. The low percentage of volatile acids in butter from cottonseed ; 2. The phenomenally high melting point of the butter from cottonseed ; 3. The persistence of the reducing agent of the butter from cottonseed, as indicated by its action upon nitrate of silver.

The melting point of the butter is higher than that of pure lard. The particular point to be noticed in this matter is, that in butter designed for consumption in Southern countries, or produced in Southern countries, the mixture of cottonseed with the feed of cows will tend to raise the melting-point of the butter, and render it more suitable for consumption in hot climates.

The persistence of the reducing agent is also a matter of interest. It has passed, in the samples examined, through the digestive organism of the cow, and has re-appeared in the butter with almost undiminished activity. The selective action of the digestive organs on the different glycerides contained in the food of the animal is also a matter of importance. It would be expected a priori that the butter from a cow fed largely on cottonseed-oil would contain more oleine and have a lower melting-point than if ordinary food were used. On the contrary, it is seen that either the more solid glycerides have been absorbed during the process of digestion, or that the oleine has undergone some distinct change in the digestive organism by which it has assimilated the qualities of the other glycerides

From an analytical point of view, the results are of great importance, since they show that a butter derived from a cow fed on cottonseed-meal or one excreting a fat of unusual quality might be condemned as adulterated when judged alone by the amount of volatile acids present. Since cottonseed-meal is destined to be a cattle-food of great importance, especially in the southern part of the United States, this is a fact of the greatest interest to analysts.

The observation of Mayer, soon to be mentioned, that the specific gravity of butter-fat varies with its content of volatile acids, I have also verified in some cases by the determination of the specific gravity of samples of butter-fat taken from the milk of the same cows kept on the same food, but taken the following day after the samples mentioned. The specific gravity for the cotton-meal fed sample was .8929 at 99°; that for the ordinary fed sample, .8991 at 990

Professor Mayer's experiments were made on a single cow of a North Holland breed. From time to time during the progress of the experiments the original food was used, in order to see what effect the period of lactation would produce. The cow was fed for twelve days on each separate ration before the samples were taken. After two days more, another set of samples was taken, and then the food changed for a new experiment.

In the butter- sat the melting and solidifying points were taken, and the volatile acids determined according to the method of Reichert. The specific gravity was also determined by the Westphal method at 100°.

The rations of the cow were composed of the following ma

« AnteriorContinuar »