Proceedings of the Academy of Natural Sciences of Philadelphia, Volumen 19Academy of Natural Sciences of Philadelphia, 1867 "Publications of the Academy of Natural Sciences of Philadelphia": v. 53, 1901, p. 788-794. |
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Acad Academy adult anteriorly April Baird Ballast Ground band base Basilosaurus bill Bill black bird body brown Cassicus caudal caudal peduncle chestnut chinch bugs collection color Conchological Section Cope culmen d'Afr dark Deposited by Geo Dict dorsal dorsal fin edged Ency Falco feathers genus Gould Gray Grenada groin groove gular fold Icterus inches inner insect John John Cassin Kaighn's Point larvæ lateral line latter legs Leidy Library Fund Lond London mandible margin miocene muzzle nares nearly neck nostrils Nouv Numerous specimens orbit Paris Philada plumage posterior preceding premolars present Proc Prof Pteroglossus Ramph Ramphastos resembling rump scarlet Sept side smaller Smiths Society South America Spec species spots SQUALODON Syst tail coverts teeth throat tibiæ tinged Total length transverse Tryon upper mandible Vaill Vieill Vitis vinifera Washington Wilkes yellow Zool
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Página 255 - THE AMERICAN JOURNAL OF THE MEDICAL SCIENCES, EDITED BY ISAAC HAYS, MD, is published Quarterly, on the first of January, April, July, and October. Each number contains at least two hundred and eighty large octavo pages, handsomely and appropriately illustrated, wherever necessary.
Página 132 - COPE, ED An addition to the Vertebrate Fauna of the Miocene Period, with a Synopsis of the Extinct Cetacea of the United States.
Página 67 - Notes" on the chinch bug, says that it "attained the maximum of its development in the summer of 1864, in the extensive wheat and corn fields of the valley of the Mississippi ; and in that single year three-fourths of the wheat and one-half of the corn crop were destroyed throughout many extensive districts, comprising almost the entire North-west, with an estimated loss of more than one hundred millions of dollars in the currency that then prevailed,
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Página 260 - HISTORY OF THE BIRDS OF EUROPE, not observed in the British Isles.
Página 221 - Let us make this addition to our assumption; that, at the commencement, the density of the nebulous matter was a vanishing quantity, as compared with the present density of the sun and planets ; we can then calculate how much work has been performed by the condensation ; we can further calculate how much of this work still exists in the form of mechanical force, as attraction of the planets towards the sun, and as vis viva of their motion, and find by this how much of the force has been converted...
Página 69 - I examined the condition of a host of these chinch bugs that had chosen for their winter covering cord-wood sticks, lying on the ground, entirely surrounded by frost and ice ; of these, 20 per cent, were living ; those that were more fortunate in their selection of winter quarters fared much better. From a single handful of leaves, picked up at one grasp from beneath an apple tree, I obtained 355 living and 312 dead...
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Página 222 - ... sun, we can form no conjecture, and the store of heat there existing can only be determined by very uncertain estimations. If, however, we adopt the very probable view, that the remarkably small density of so large a body is caused by its high temperature, and may become greater in time, it may be calculated that if the diameter of the sun were diminished only the ten-thousandth part of its present length, by this act a sufficient quantity of heat would be generated to cover the total emission...
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