Proceedings of the American Academy of Arts and Sciences, Volumen20Metcalf and Company, 1885 Vol. 12 (from May 1876 to May 1877) includes: Researches in telephony / by A. Graham Bell. |
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... Position in Stratigraphic Geology . By JULES MARCOU 174 XII . Contributions to the Botany of North America . By ASA GRAY 257 • • . 311 XIII . Notes on some Species of Gymnosporangium and Chrysomyza of the United States . By W. G. FARLOW ...
... Position in Stratigraphic Geology . By JULES MARCOU 174 XII . Contributions to the Botany of North America . By ASA GRAY 257 • • . 311 XIII . Notes on some Species of Gymnosporangium and Chrysomyza of the United States . By W. G. FARLOW ...
Página 25
... position and shape of the otoliths and the degree of development of the pectorals become also excellent guides to the identification of eggs well advanced in their development . The differences in the young embryos on hatching are very ...
... position and shape of the otoliths and the degree of development of the pectorals become also excellent guides to the identification of eggs well advanced in their development . The differences in the young embryos on hatching are very ...
Página 28
... positions , as recommended by Kingsley and Conn . The eggs were confined in a live - box , and the light controlled by the aid of Zeiss's illuminating apparatus ( after Abbe ) . Two com- plete series of vertical optical sections were ...
... positions , as recommended by Kingsley and Conn . The eggs were confined in a live - box , and the light controlled by the aid of Zeiss's illuminating apparatus ( after Abbe ) . Two com- plete series of vertical optical sections were ...
Página 33
... position of the first cleavage - spindle . But what explanation can be given of this con- striction , which after appearing twice vanishes without accomplishing anything ? We shall undertake later to show that this phenomenon is only ...
... position of the first cleavage - spindle . But what explanation can be given of this con- striction , which after appearing twice vanishes without accomplishing anything ? We shall undertake later to show that this phenomenon is only ...
Página 37
... position so as to be of no use in orien- tation . The long axis is regarded as the axis of the ovum , and the first cleavage as equatorial , since it cuts the axis at right angles near . the middle . Unlike most observers , Goette does ...
... position so as to be of no use in orien- tation . The long axis is regarded as the axis of the ovum , and the first cleavage as equatorial , since it cuts the axis at right angles near . the middle . Unlike most observers , Goette does ...
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Términos y frases comunes
Abdomen abdominal appendages Acad Academy acetic acid acute areola Astacus Barrande base Bentham blastodisc border Boston bracts branches broad California calyce calyx Cambarus Cambridge carapace cells Cephalothorax cervical groove chela ciliate cleavage cleavage-plane collected corolla difference of potential Dikelocephalus Emmons entoderm Eritrichium feet flowers foliis fossils fruit galvanometer genera genus George Bentham glabrous Graptolites Gray gynobasi Hagen inches long lateral leaflets leaves length limestone lines long lobes longis male margin maxillipeds median Mountains N. S. XII nearly nuclei Nuculæ nutlets observations Olenus ovum pair of legs papillæ Paradoxides parum pedicels periblast plate platinum posterior Potsdam precipitate Primordial fauna Proc Professor pubescent punctate ring River rostrum sæpius sandstone schists second fauna segment sepals short side Silurian slates slender somites species specimens spermogonia spines stars strip superficial tension surface Taconic system telson tion Trilobites tube upper ventral
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Página 185 - On the Primordial Fauna and the Taconic System, by Joachim Barrande. With Additional Notes by Jules Marcou.
Página 250 - Silurian System' as characterizing the Lower Silurian division, and which I have named second fauna. It is then just to recognize this priority, and I think it all the more fitting to state it at this time, that it has not been claimed to this day.
Página 202 - On some new Species of Fossils from the Limestone near Point Levi, opposite Quebec...
Página 376 - ... thickish summit entire: seed 1£ lines long, the wing 4 lines long by 2| broad. — This unusually distinct species has been found (by Thomas Howell, in June, 1884) only at high elevations in the Siskiyou Mountains, California, on the head-waters of the Illinois River, in rather dry rocky ground. It grows to a height of from 100 to 150 feet, and a diameter of 1 to 3 feet. Bark reddish. The specific name is given in compliment to Prof. WH Brewer, who in connection with the California State Geological...
Página 530 - with the great discovery of the quantification of the predicate," adds : — " I must continue to hold that the principle of quantification is explicitly stated by Mr. Bentham ; and it must be regarded as a remarkable fact in the history of logic, that Hamilton, while vindicating in 1847 his own claims to originality and priority as against the scheme of De Morgan, should have overlooked the much earlier and more closely related discoveries of Bentham.
Página 497 - One observer tested the light photometrically, whilst another observed the galvanometer, with the result that with similar photometric observations the thermopile indicated a large change in the amount of heat received. In conclusion, the author thinks it possible to assume as a practical standard a carbon loop in an exhausted vessel raised to such a point of incandescence that it will radiate a definite amount of energy, this energy being measured by a bolometer strip or the thermopile at a definite...
Página 19 - GERALINCRA nov. gen. Cephalothorax ovate, the front rounded, one third as broad as hinder portion. Palpi large and robust, with interior spines. First two pairs of legs slender, the hinder stout and broad. Abdomen composed of nine joints, the basal three rather short, the others subequal and longer. Postabdomen much as in Thelyphonus. Geralinura carbonaria nov. sp. Hinder legs three times as stout as the front pairs, the fourth much longer than the third. Abdomen about twice as long as broad. Postabdomen...
Página 356 - ... or rarely sparingly toothed, 2 or 3 inches long, on a stout usually reddish petiole 4 to 8 lines long : flowers in dense closely panicled spikes a half-inch long or less, the rounded bracts and sepals purplish ; petals light yellow : fruit compressed-ovate, 2 or 3 lines long, viscid-pubescent. — On hills and mountains, away from the coast, from San Diego to Los Angeles County, the Camillas Mountains in Lower California, and in Southern Arizona ; also on Santa Catalina Island (WH Lyon).
Página 389 - ... and in separating the sulphides it would be necessary to know the weight of the asbestos felt, since it must be weighed finally with the insoluble sulphides, unless removed by a special treatment which involves the solution, filtration and reprecipitation of the latter. It is to meet cases like these that I have sought a filter which, in the reversal of the ordinary mode of separating filter and precipitate, should dissolve easily in solvents which do not affect the ordinary precipitates met...
Página 321 - Abietis of Europe, although, as the spores were not quite ripe, one cannot be certain. If there is a difference, it is to be found in the fact that the teleutospores are arranged in threads which branch less than in the European form. But at a later stage of development this supposed difference might disappear. At the same time and place Mr. Seymour found another interesting species of...