Proceedings of the American Academy of Arts and Sciences, Volumen51Metcalf and Company, 1915 Vol. 12 (from May 1876 to May 1877) includes: Researches in telephony / by A. Graham Bell. |
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Página 7
... become more or less disorganized . Secondary appendages absent . Antheridia arising in a single row , more or less displaced by crowding , so that the series may appear double : short and stout , the stalk - cell usually slightly longer ...
... become more or less disorganized . Secondary appendages absent . Antheridia arising in a single row , more or less displaced by crowding , so that the series may appear double : short and stout , the stalk - cell usually slightly longer ...
Página 10
... become obliterated in this region : the cells of the anterior and posterior rows similar , narrower , a majority of ... becoming more or less free in a mucus group . Venter of the perithecium hyaline , or faintly tinged with yellowish ...
... become obliterated in this region : the cells of the anterior and posterior rows similar , narrower , a majority of ... becoming more or less free in a mucus group . Venter of the perithecium hyaline , or faintly tinged with yellowish ...
Página 12
... becoming slightly brownish , broad and flattened , very variable in size ; the cells of the receptacle multinucleate . Basal cell longer than broad , broader distally , variably intruded between two paired elongated subbasal cells , the ...
... becoming slightly brownish , broad and flattened , very variable in size ; the cells of the receptacle multinucleate . Basal cell longer than broad , broader distally , variably intruded between two paired elongated subbasal cells , the ...
Página 13
... becoming more or less free and irregularly developed . Perithecium concolorous , one half free , and convex on the ... become more or less free in irregular groups . Although far more highly developed this species remotely resembles ...
... becoming more or less free and irregularly developed . Perithecium concolorous , one half free , and convex on the ... become more or less free in irregular groups . Although far more highly developed this species remotely resembles ...
Página 17
... becoming brown , short , slightly curved outward , subtended by a single small cell to which they are attached by a narrow stalk , and distinguished by a dark septum ; the series ending in the large highly differentiated primary ...
... becoming brown , short , slightly curved outward , subtended by a single small cell to which they are attached by a narrow stalk , and distinguished by a dark septum ; the series ending in the large highly differentiated primary ...
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Términos y frases comunes
abiotic abiotic action abiotic effects abiotic radiations absorption albite antheridia atoll axostyle basal cell Birch-Hirschfeld blepharoplast cataract change of volume chromatic basal rod chromosomes coral cornea corneal corpuscles crystals curve cytoplasm cytostome depth diameter diaphragm distally energy ergs erythropsia experiments exposed exposure feldspars FIGURE filaments flagella flagellum glass granules heat effects hyaline II-III intensity islands lagoon larva later lens epithelium Leptomyrmex less longis magnetite magnetite arc measurements mesenteries microcline minutes mitosis myxosporidium nearly normal nuclei observed obtained ocean parabasal paradesmose perithecium perthitic phase photophthalmia Pleistocene posterior pressure produced quartz reaction receptacle reefs retina scotoma screen sea-level shown side slightly species spectrum spore sporoblasts stage stained surface temperature theory thermic thickness tion transition line Trichomonas triple point ultra violet ultra violet light undulating membrane usually values velocity wave length μμ
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Página 734 - ... condition. Turn-over pig molds when not in use should be left upside down to prevent their accumulating moisture. GLASS-BLOWERS' CATARACT It has been recognized for many years that glass-blowers appear to be particularly susceptible to a special form of cataract, which begins in the posterior part of the lens, the remainder of the lens for a long time remaining clear. The cataract most frequently appears in the left eye, which is more exposed to the molten mass. The length of time necessary for...
Página 510 - Koch, G. von. 1882. Ueber die Entwicklung des Kalkskeletes von Asteroides calycularis und dessen morphologischer Bedeutung. Mitt. Zool. Sta. Neapel, Bd. Ill, p. 284-292, Taf. 22-24. 1897. Entwicklung von Caryophyllia cyathus.
Página 238 - ... perhaps, the most interesting conclusion in this volume), that the movements must either have been uniform and exceedingly slow, or have been effected by small steps, separated from each other by long intervals of time, during which the reef-constructing polypifers were able to bring up their solid frame-works to the surface.
Página 625 - The investigation has been assisted in great measure by generous grants from the Bache Fund of the National Academy of Sciences and from the Rumford Fund of the American Academy of Arts and Sciences. The...
Página 479 - AE Kennelly and GW Pierce. The Impedance of Telephone Receivers as Affected by the Motion of their Diaphragms.
Página 541 - ... group of the same rank, under the same name. When a species is moved from one genus into another, its specific epithet must be changed if it is already borne by a valid species of that genus.
Página 166 - The causes of the general rise of sea-level in the latest geological time might perhaps be connected with those climatic changes which the earth underwent in the Glacial period. If, during that time, northern Europe, northern North America, and the Antarctic regions were simultaneously glaciated, a considerable mass of water must have been removed from the ocean, and, if the thickness of ice be assumed as 1,000 meters, the sea-level must have been 150 meters below its present...
Página 740 - Bell indicate their belief most clearly in the statement "as regards definite pathological effects or permanent impairment of vision from the exposure to the luminous rays alone, we have been unable to find either clinically or experimentally anything of a positive nature. "Experiments on animals and on the human subject as well prove that the retina may be flooded for an hour or more with light of extreme intensity (not less than 50,000 lux) without any sign of permanent injury. Only when the concentration...
Página 196 - ... the atolls of the Low Archipelago the depth varies from 20 to 38 fathoms, and in the Marshal Group, according to Chamisso, from 30 to 35 : in the Caroline atolls it is only a little less. Within the Maldiva atolls there are large spaces with 45 fathoms, and some soundings are laid down of 49 fathoms. The greater part of the bottom in most lagoons, is formed of sediment; large spaces have exactly the same depth...
Página 364 - Trichomonaden und ihre Organisation im allgemeinen. Arch. f. Protist., Bd. 39 MARTIN, CH, AND ROBERTSON, MURIEL 1911 Further observations on the coecal parasites of fowls with some references to the rectal fauna of other vertebrates. Part I. Quart Jour. Mic. Sci., vol. 57. SWEZY, OLIVE 1916 The kinetonucleus of flagellates and the binuclear theory of Hartmann. Univ. of C'al. Publ. in Zool., vol. 16.