Studies in animal lifeHarper, 1860 - 146 страници |
Често срещани думи и фрази
ÆSCHYLUS animal forms animal kingdom animalcule Articulata backbone become bird body branches breathe called capsule cats cells Cercaria characters cilia classes classification colony common complex Crustaceans cuttlefish Cuvier desiccation digestive tube dirt or moss distinct dogs earth eggs embryo ence Entomostraca evaporation existence experiments fact feelers fish fixity of species four thousand frog genera Geoffroy St hare Hydra hypothesis idea individual Infusoria insects labor languages larvæ Linnæus living lungs magnified male mals mantle membrane ment microscope Mollusca mollusks mouth Muslin nacre Natural History naturalists observed once Opalina organs Origin of Species oyster parasites pearls Pfaff plants Polypes ponds Protozoa rabbit races Radiata resemble resuscitation revive Rotifera Rotifers sand shells skeleton stomach studies surface swimming tail Tardigrade tentacles things thread-worms tion true variable varieties Vertebrata vertebrate Volvox watch-glass worms young zoologists
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Страница 124 - Most wretched men Are cradled into poetry by wrong, They learn in suffering what they teach in song.
Страница 119 - As buds give rise by growth to fresh buds, and these, if vigorous, branch out and overtop on all sides many a feebler branch, so by generation I believe it has been with the great Tree of Life, which fills with its dead and broken branches the crust of the earth, and covers the surface with its ever-branching and beautiful ramifications.
Страница 118 - The affinities of all the beings of the same class have sometimes been represented by a great tree. I believe this simile largely speaks the truth. The green and budding twigs may represent existing species; and those produced during former years may represent the long succession of extinct species.
Страница 117 - It is a truly wonderful fact — the wonder of which we are apt to overlook from familiarity — that all animals and all plants throughout all time and space should be related to each other in groups subordinate to groups, in the manner which we everywhere behold...
Страница 94 - I do not greatly deceive myself, on the view that the Natural System is founded on descent with modification ; — that the characters which naturalists consider as showing true affinity between any two or more species, are those which have been inherited from a common parent...
Страница 101 - Altogether at least a score of pigeons might be chosen, which, if shown to an ornithologist, and he were told that they were wild birds, would certainly be ranked by him as well-defined species.
Страница 117 - On the view that each species has been independently created, I can see no explanation of this great fact in the classification of all organic beings; but, to the best of my judgment, it is explained through inheritance and the complex action of natural selection, entailing extinction and divergence of character, as we have seen illustrated in the diagram.
Страница 24 - It has not been sufficiently insisted on, that in the various branches of Social Science there is an advance from the general to the special, from the simple to the complex, analogous with that which is found in the series of the sciences, from Mathematics to Biology. To the laws of quantity comprised in Mathematics and...
Страница 118 - ... of the former and present buds by ramifying branches may well represent the classification of all extinct and living species in groups subordinate to groups. Of the many twigs . which flourished when the tree was a mere bush, only two or three, now grown into great branches, yet survive and bear the other branches; so with the species which lived during long-past geological periods, very few have left living and modified descendants.
Страница 60 - ... moisture of the breath has evaporated, the wafer be shaken off, we shall find that the whole polished surface is not as it was before, although our senses can detect no difference ; for if we breathe again upon it the surface will be moist everywhere except on the spot previously sheltered by the wafer, which will now appear as a spectral image on the surface. Again and again we breathe, and the moisture evaporates, but still the spectral wafer reappears. This experiment succeeds after a lapse...