Studies in Animal LifeHarper, 1860 - 146 páginas This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant. |
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Página 14
... important trifles - work by daylight , sel- dom or never by lamplight ; and keep the unoccu- pied eye open . With these precautions you may work daily for hours without serious fatigue to the eye . Now where shall we begin ? Any where ...
... important trifles - work by daylight , sel- dom or never by lamplight ; and keep the unoccu- pied eye open . With these precautions you may work daily for hours without serious fatigue to the eye . Now where shall we begin ? Any where ...
Página 16
... important service in almost every animal you examine . Some- times the cilia act as instruments of locomotion ; sometimes as instruments of respiration , by contin- ually renewing the current of water ; sometimes as the means of drawing ...
... important service in almost every animal you examine . Some- times the cilia act as instruments of locomotion ; sometimes as instruments of respiration , by contin- ually renewing the current of water ; sometimes as the means of drawing ...
Página 37
... importance , there would have seemed something ludicrously ab- surd in the assertion that the newly - discovered dif- ferential calculus was infinitely more important to England and to Europe than the fate of all the dy- nasties ; and ...
... importance , there would have seemed something ludicrously ab- surd in the assertion that the newly - discovered dif- ferential calculus was infinitely more important to England and to Europe than the fate of all the dy- nasties ; and ...
Página 55
... importance to such trivialities as specific dis- tinctions resting solely upon color or size , we can look profound , you know , and repudiate the charge . But this is a public and official attitude . In pri- vate we can despise the ...
... importance to such trivialities as specific dis- tinctions resting solely upon color or size , we can look profound , you know , and repudiate the charge . But this is a public and official attitude . In pri- vate we can despise the ...
Página 74
... importance . The one reason why the study of science is valuable as a means of culture , over and above its own immediate objects , is that in it the mind learns to submit to realities instead of thrusting its figments in the place of ...
... importance . The one reason why the study of science is valuable as a means of culture , over and above its own immediate objects , is that in it the mind learns to submit to realities instead of thrusting its figments in the place of ...
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Términos y frases comunes
animal forms animal kingdom animalcule Articulata backbone become bird body branches breathe budding called capsule cells Cercaria CHAPTER characters cilia classes classification colony common Comparative Anatomy Crustaceans cuttlefish Cuvier desiccation digestive tube dirt or moss distinct dogs dust earth eggs embryo ence Entomostraca existence experiments fact feelers fish fixity of species four thousand frog genera Geoffroy St glass hare Hydra hypothesis idea individual Infusoria insects labor languages larvæ Life.-The Linnæus living lungs male mals mantle membrane ment microscope Mollusca mollusks mouth Muslin mussel nacre Natural History naturalists once Opalina Origin of Species oyster paradoxical parasites pearls Pfaff plants Polype ponds Protozoa rabbit races Radiata resemble resuscitation revive Rotifera Rotifers shells skeleton stomach studies surface swimming tail Tardigrade tentacles things thread-worms tion true variable varieties Vertebrata vertebrate Volvox worms young youth zoologists
Pasajes populares
Página 118 - Most wretched men Are cradled into poetry by wrong, They learn in suffering what they teach in song.
Página 113 - 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.
Página 111 - 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...
Página 95 - 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.
Página 111 - 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.
Página 18 - 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...
Página 54 - ... 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...
Página 55 - ... spectre of the key will again appear. In the case of bodies more highly phosphorescent than paper, the spectres of many different objects which may have been laid on it in succession will, on warming, emerge in their proper order. This is equally true of our bodies and our minds. We are involved in the universal metamorphosis. Nothing leaves us wholly as it found us. Every man we meet, every book we read, every picture or landscape we see, every word or tone we hear, mingles with our being and...
Página 97 - Latin ; if all historical documents previous to the fifteenth century had been lost ; if tradition even were silent as to the former existence of a Roman empire, a mere comparison of the six Romance dialects would enable us to say that at some time there must have been a language from which all these modern dialects derived their origin in common ; for without this supposition it would be impossible to account for the facts exhibited by these dialects.
Página 98 - But a change from je suis to tii es is inexplicable by the light of French grammar. These forms could not have grown, so to speak, on French soil, but must have been handed down as relics from a former period — must have existed in some language antecedent to any of the Romance dialects.