Proceedings of the American Academy of Arts and Sciences, Band 17Metcalf and Company, 1882 Vol. 12 (from May 1876 to May 1877) includes: Researches in telephony / by A. Graham Bell. |
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Häufige Begriffe und Wortgruppen
acuminate acute antimony atoms base beam Benth body Boston bracts breaking weight bromide calyx Caracol Mountains carbonate carpels caudal fin chloride chromatophores Coahuila colors corolla crystals curcumin DALEA Deflection dorsal and anal elongated embryonic fin fin rays Fishes flowers foliis formula glabrous grammes Gray Guanajuato Guanajuato Dugès H₂O head heat Hemsl herbarium inches long insects lanceolate leaflets leaves length Lerios less lines long lobes Lophius Lorenzo de Laguna measuring Monclova Monterey nearly Nuevo Leon Nutt oblong obtained obtuse ovate oxide P₂O Parry & Palmer pectorals pedicels peduncles petals petioles pigment cells pigment spots plant potassic precipitate pubescent racemes Saltillo San Luis Potosi San Miguelito San Miguelito Mountains San Rafael Mountains Schaffner sepals sessile Sierra Madre silver slender soluble solution south of Saltillo species specimens stage Plate stems Sutherland Springs temperature Texas Torr ventrals Willd yellow young
Beliebte Passagen
Seite 433 - It can now be asserted upon convincing evidence that savagery preceded barbarism in all the tribes of mankind, as barbarism is known to have preceded civilization.
Seite 452 - Insects" appeared in 1862, thus forming the second volume of the whole series; and the two volumes "On the Effects of Cross- and Self-Fertilization in the Vegetable Kingdom," and "The Different Forms of Flowers on Plants of the same Species...
Seite 458 - The proof of this great generalization, like that of all other generalizations, lies mainly in the fact that the evidence in its favor is continually augmenting, while that against it is continually diminishing, as the progress of science reveals to us more and more of the workings of the universe.
Seite 452 - Plants," illustrating Variation, Inheritance, Reversion, Interbreeding, &c. ; the volume on the "Descent of Man, and Selection in Relation to Sex," — which extended the hypothesis to its logical limits, — and that "On the Expression of the Emotions in Man and the Lower Animals," published in 1872, which may be regarded as the last of this series. Since then Mr. Darwin appears to have turned from the highest to the lower forms of life, and to have entered upon the laborious cultivation of new...
Seite 255 - Ubi irritatio, ibi affluxus; therefore it is not improper to conclude that a powerful action in the development of the muscles is here the cause of a stronger combustion and of an oxidation in the adjacent parts of the external crust of insects. But not the pattern of the thorax alone follows the lines of the muscles. On the head we find a certain pattern corresponding to the muscles of the mandibular apparatus ; another one on the segments of the abdomen corresponding to the so-called respiratory...
Seite 39 - Let -IT and ir1 denote the heat — measured in dynamical equivalents — absorbed and evolved at the hot and cold junctions respectively in unit time by unit current. Let E be the electromotive force of a battery, maintaining a current / in such a direction as to cause absorption of heat at the hot junction. Then if R be the whole resistance of the circuit, we have by Joule's law and the first law of thermodynamics : — EI+irI—Tir=ltI*.
Seite 435 - Catalogue of the Cabinet of Natural History of the State of New York and of the Historical and Antiquarian Collection annexed thereto.
Seite 316 - DR. EDWARD PALMER'S present collection was made during the last six months of 1879, mostly in the region lying northwest of San Antonio, Texas, and along the routes from that place to Laredo and Eagle Pass upon the Rio Grande, and during the following year in the States of Coahuila and Nuevo Leon in Mexico. A nearly complete set of these plants was sent to the herbarium at Kew, England, and a partial list was there somewhat hastily made, which is the basis of the present one. In addition, determinations...
Seite 455 - Galileo was to physical science iu his time, Darwin is to biological science in ours. This without reference to the fact that the writings of both conflicted with similar prepossessions ; and that the Darwinian theory, legitimately considered, bids fair to be placed in this respect upon the same footing with the Copernican system. An English poet wrote that he awoke one morning and found himself famous. When this happened to Darwin, it was a genuine surprise. Although he had addressed himself simply...
Seite 449 - Darwin was a keen fox-hunter in his youth, — not a bad pursuit for the cultivation of the observing powers. There is good authority for the statement — though it has nowhere been made in print — that at Cambridge he was disposed at one time to make the Church his profession, following the example of Buckland and of his teacher, Sedgwick. But in 1831, just as he was taking his bachelor's degree, Captain Fitzroy offered to receive into his own cabin any naturalist who was disposed to accompany...