The American Naturalist, Volume 18Essex Institute, 1884 |
Contents
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Common terms and phrases
acid alcohol American animal appear beds birds body bones botanical Carboniferous carminic carminic acid Carnivora cavity cells character Cheezhoo chitinous cilia coast colonies color Cope Creodonta Cretaceous Crustacea Cunina cusps deposits described dorsal eggs Eocene external fact feet female fish fossils four genera genus Geol geological glacial glands Hañka inches individual insects intercentrum interior island known Lake larva larvæ latter legs lower mass Mesonyx Metazoa microscope mineral Miocene Mitraria molars mollusks mountains Museum natural NATURALIST nerves North observations occur organs origin ovum paper Phenacodus plants Plate portion posterior premolars present probably Professor protoplasm Ptilodus Puerco quartz region resemblance rhabdodon river rocks Science seen segments sexual side skull Society species specimens structure surface teeth thick tion tissue trachea trees true molars tube upper vertebrates
Popular passages
Page 591 - Mathematics may be compared to a mill of exquisite workmanship, which grinds you stuff of any degree of fineness ; but, nevertheless, what you get out depends on what you put in ; and as the grandest mill in the world will not extract wheat-flour from peascods, so pages of formulae will not get a definite result out of loose data.
Page 2 - Transformations of Planorbis at Steinheim, with Remarks on the Effects of Gravity Upon the Forms of Shells and Animals.
Page 313 - Each observer is requested to prepare, at his earliest convenience, a complete list of the birds known to occur in the vicinity of his Station, and to indicate (by the abbreviations enclosed in parentheses) to which of the following five categories each species pertains: — 1.
Page 439 - ... in morals and intellect, must be an admitted fact in all schemes of regenerative policy. The hereditary taint due to the primeval barbarism of our race, and maintained by later influences, will have to be bred out of it before our descendants can rise to the position of free members of an intelligent society; and I may add that the most likely nest at the present time, for self-reliant natures, is to be found in states founded and maintained by emigrants.
Page 439 - I believe that it arises very much from the fact that hitherto we have tried to teach animals, rather than to learn from them— to convey our ideas to them, rather than to devise any language, or code of signals, by means of which they might communicate theirs to us.
Page 988 - Potsdam from the crystalline rocks known as "primary," in an orderly chronological scheme. In his report on the agriculture of New York, issued four years after that on the geology of the second district, he makes more definite and convincing statements, going over the whole subject de novo. He gives diagrams showing the Taconic slates lying below the Calciferous sandrock...
Page 970 - It will be found excellent practice in the mental operations required by this doctrine to imagine a train, the fore part of which is an engine and three carriages linked with iron couplings, and the hind part three other carriages linked with iron couplings ; the bond between the two parts being made up out of the sentiments of amity subsisting between the stoker and the guard.
Page 983 - In Minnesota it is found on the international boundary at Saganaga lake, and large boulders from it are included in the overlying conglomerate at Ogishke Muncie lake, showing an important break in the stratigraphy. Thickness unknown but very great. These six great groups compose, so far as can be stated now, the crystalline rocks of the Northwest. Their geographic relations to the non-crystalline rocks, if not their...
Page 742 - Ichneumonida; feeding within the live bodies of their prey, cats playing with mice, otters and cormorants with living fish, not as instincts specially given by the Creator, but as very small parts of one general law leading to the advancement of all organic bodies — Multiply, Vary, let the strongest Live and the weakest Die.
Page 706 - But in spring, autumn, and winter, or, in exceptional years, through much of the summer, it seems probable that the river was confined to a channel, being of insufficient volume to cover its flood-plain. At such time this plain was the site of human habitations and industry.