Physiology: preliminary course lecturesC.R. Murry, 1879 - Всего страниц: 288 |
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Стр. 40
... definite amount of heat ; precisely that amount of heat was abstracted from the sun in order to form that bit of cotton . This is a representative case . Every tree , every plant , every flower , flourishes and blooms by the grace and ...
... definite amount of heat ; precisely that amount of heat was abstracted from the sun in order to form that bit of cotton . This is a representative case . Every tree , every plant , every flower , flourishes and blooms by the grace and ...
Стр. 46
... definite trains ( nerve- strands ) to special destinations . If a muscle contract , it contracts in obedience to stimulus carried to it by a motor nerve . The stimulus conveyed along the nerve has its development in a nerve - center ...
... definite trains ( nerve- strands ) to special destinations . If a muscle contract , it contracts in obedience to stimulus carried to it by a motor nerve . The stimulus conveyed along the nerve has its development in a nerve - center ...
Стр. 50
... definite and successive changes without destruction of identity . " Duges calls it " the special activity of organized bodies , " Beclard , " organisation in action , " and Spencer , " the coördination of action . " Truly , it might be ...
... definite and successive changes without destruction of identity . " Duges calls it " the special activity of organized bodies , " Beclard , " organisation in action , " and Spencer , " the coördination of action . " Truly , it might be ...
Стр. 57
... definite knowledge of the deposition of these ancient forms of life to the great natural philosopher of France , George Cuvier . This observer discovered that the fossils deposited last , that is , those nearest the surface in ...
... definite knowledge of the deposition of these ancient forms of life to the great natural philosopher of France , George Cuvier . This observer discovered that the fossils deposited last , that is , those nearest the surface in ...
Стр. 62
... definite and extensive knowledge afforded by a footprint to the paleontologist or com- parative anatomist ? " Whoso sees merely the print of a cleft foot , " wrote Cuvier , " may conclude that the animal which left this impression ...
... definite and extensive knowledge afforded by a footprint to the paleontologist or com- parative anatomist ? " Whoso sees merely the print of a cleft foot , " wrote Cuvier , " may conclude that the animal which left this impression ...
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acid gas action afferent nerve albumen albumenoid become birds blood corpuscles body bone brain canals carbonic acid carbonic acid gas cartilage cavity chemical cilia coal coccyx color combustion comparative anatomy compounds contraction cord Darwin discovery disease earth effect elasticity electricity elements entirely excretions exhibits existence fact fibrin fluid fœtus frog fuel Goethe hæmoglobin Haller Haversian canals heat human individual inorganic insects irritation Lamarck layers living manifest masses of protoplasm mechanical medicine ment microscope motion movements muscle fibre muscular force muscular sense myosin natural selection nerve cells nerve fibres nerve force nervous system nucleolus nucleus observed original ovum oxidation oxidised oxygen periosteum phenomena physical physician physiology plants properties protoplasm quantity reproduction salts sarcolemma sensitive nerve simply species spermatozoid spinal structure substance surface theory tion tissue tubes various vertebrate vessels wall whole yolk zona pellucida
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Стр. 8 - Himself best knows : but strangely-visited people, All swoln and ulcerous, pitiful to the eye, The mere despair of surgery, he cures ; Hanging a golden stamp about their necks, Put on with holy prayers : and 'tis spoken, To the succeeding royalty he leaves The healing benediction.
Стр. 62 - I look at the natural geological record, as a history of the world imperfectly kept, and written in a changing dialect ; of this history we possess the last volume alone, relating only to two or three countries. Of this volume, only here and there a short chapter has been preserved ; and of each page, only here and there a few lines.
Стр. 103 - There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.
Стр. 180 - He who rejects with scorn the belief that the shape of his own canines, and their occasional great development in other men, are due to our early progenitors having been provided with these formidable weapons, will probably reveal by sneering the line of his descent. For, though he no longer intends, nor has the power, to use these teeth as weapons, he will unconsciously retract his "snarling muscles
Стр. 62 - ... foot may conclude that the animal which left this impression ruminated, and this conclusion is as certain as any other in physics or morals. This footprint alone, then, yields to him who observes it, the form of the teeth, the form of the jaws, the form of the...
Стр. 133 - See dying vegetables life sustain, See life dissolving vegetate again : All forms that perish other forms supply, (By turns we catch the vital breath, and die) Like bubbles on the sea of matter borne They rise, they break, and to that sea return.
Стр. 103 - Thus from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, — namely, the production of the higher animals, — directly follows.
Стр. 15 - He must occasionally act as butler, and dress hair and wigs. He will be required sometimes to read prayers, and to preach a sermon every Sunday. A good salary will be given.
Стр. 34 - ... cubic miles of such matter to weigh a single grain. The general attractive force of all matter must, however, impel these masses to approach each other, and to condense, so that the nebulous sphere became incessantly smaller, by which, according to mechanical laws, a motion of rotation originally slow, and the existence of which must be assumed, would gradually become quicker and quicker.
Стр. 90 - But for some years I could not conceive how each form became so excellently adapted to its habits of life. I then began systematically to study domestic productions, and, after a time, saw clearly that man's selective power was the most important agent. I was prepared, from having studied the habits of animals, to appreciate the struggle for existence, and my work in geology gave me some idea of the lapse of past time. Therefore when I happened to read " Malthus on Population," the idea of natural...