Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Tom 35American Philosophical Society, 1896 |
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Amer American ancient animal Arkansas bairdi beds belong bone border C. A. White cathode Central Cetotherium character chitinized Conway county Cope Crawford county crest Cushing described diameter distal edge external fauna feet figure Florida fossils Gastrioceras genus Geological Gesellschaft Goniatites hamules Historical Society inches Indian Territory island key dwellers lateral lobes Lenard rays length Limestone Lower Carboniferous Lower Coal Measures mangrove median Meek and Worthen Mesohippus mounds natural selection nearly Nebraska orbit original orthogenesis painted Permian PHILOS plants Plate portion posterior posteriorly Poteau mountain probably PROC Productus Prof Pronorites Prussia region represented river Röntgen sclerite Scott county Sebastian county shell side skull southeast quarter species specimen surface Survey sutures teeth Texas tion transverse tube U. S. Geol umbilicus Upper Coal Measures variations Verein vertebræ White county whorl width XXXV
Popularne fragmenty
Strona 192 - ... to the author of the best discovery, or most useful invention, relating to Navigation, Astronomy, or Natural Philosophy (mere natural history only excepted...
Strona 306 - And they said, Go to, let us build us a city, and a tower, whose top may reach unto heaven ; and let us make us a name, lest we be scattered abroad upon...
Strona 96 - Darwin repeatedly refers the cause or origin of variation to "changed conditions of life," which is essentially the position maintained by the Lamarckians, and he as strenuously combats those who hold that definite variation is an Innate attribute of life. " But we must, I think, conclude . . . ." writes Darwin in the latter book, "that organic beings, when subjected during several generations to any change whatever in their conditions, tend to vary'.
Strona 97 - This preservation, during the battle for life, of varieties which possess any advantage in structure, constitution, or instinct, I have called Natural Selection ; and Mr. Herbert Spencer has well expressed the same idea by the Survival of the Fittest.
Strona 103 - WoFUL DECADE." — A WEDDING FEAST. — A CAPTIVE BRIDEGROOM. FOB untold ages Maine had been one unbroken forest, and it was so still. Only along the rocky seaboard or on the lower waters of one or two great rivers a few rough settlements had gnawed slight indentations into this wilderness of woods; and a little farther inland some dismal clearing around a blockhouse or stockade let in the sunlight to a soil that had lain in shadow time out of mind. This waste of savage vegetation survives, in some...
Strona 179 - ... offspring. The offspring also will thus have a better chance of surviving; for of the many individuals of any species which are periodically born, but a small number can survive. I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection, in order to mark its relation to man's power of selection.
Strona 405 - Governor entered Pacaha, and took quarters in the town where the Cacique was accustomed to reside. It was enclosed and very large. In the towers and the palisade were many loopholes. There was much dry maize, and the new was in great quantity, throughout the fields. At the distance of half a league to a league off were large towns, all of them surrounded with stockades. Where the Governor stayed was a great lake, near to the enclosure; and the water entered a ditch that well-nigh went round the town....
Strona 109 - There is a type of popular writings which attempts to evolve many of the forms of plants as a mere protection from assumed enemies. Perhaps the plant features which have been most abused in this manner, are the spines, prickles and the like, and the presence of acrid or poisonous qualities. As a sample of this type of writing, I will make an extract from Massee's Plant World : "Amongst the most prominent and general modes of protection of vegetative parts against the attacks of living enemies may...
Strona 88 - We must not conceal from ourselves the fact," says Roux, "that the causal investigation of organism is one of the most difficult, if not the most difficult, problem which the human intellect has attempted to solve, and that this investigation, like every causal science, can never reach completeness, since every new cause ascertained only gives rise to fresh questions concerning the cause of this cause.
Strona 103 - Young seedlings in millions spring every summer from the black mould, rich with the decay of those that had preceded them, crowding, choking, and killing each other, perishing by their very abundance ; all but a scattered few, stronger than the rest, or more fortunate in position, which survive by blighting those about them. They in turn, as they grow, interlock their boughs, and repeat in a season or two the same process of mutual suffocation. The forest is full of lean saplings dead or dying with...