The Harveian Oration, 1865

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Macmillan and Company, 1865 - Broj stranica: 85
 

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Stranica 62 - I remember that when I asked our famous Harvey, in the only discourse I had with him, which was but a little while before he died, what were the things which induced him to think of a circulation of the blood, he answered me, that when he took notice that the valves in the veins of so many parts of the body were so placed that they gave free passage to the blood towards the heart, but opposed the passage of the venal blood the contrary way...
Stranica 25 - TO SUPPOSE that the eye with all its inimitable contrivances for adjusting the focus to different distances, for admitting different amounts of light, and for the correction of spherical and chromatic aberration, could have been formed by natural selection, seems, I freely confess, absurd in the highest degree.
Stranica 11 - If, therefore, the attempt to explain them as the results of a similarity of the functions to be performed by such homologous parts entirely fails to satisfy the conditions of the problem ; and if, nevertheless, we are, with Cuvier, to reject the idea of their being manifestations of some higher type of organic conformity on which it has pleased the divine Architect to build up certain of his diversified living works, there then remains only the alternative that special homologies are matters of...
Stranica 15 - Either the multitudinous kinds of organisms that now exist, and the still more multitudinous kinds that have existed during past geologic eras, have been from time to time separately made ; or they have arisen by insensible steps, through actions such as we see habitually going on.
Stranica 25 - ... if, further, the eye does vary ever so slightly, and the variations be inherited, which is certainly the case ; and if any variation or modification in the organ be ever useful to an animal under changing conditions of life, then the difficulty of believing that a perfect and complex eye could be formed by natural selection, though insuperable by our imagination, can hardly be considered real.
Stranica 57 - ... must very quickly pass through the organ. Second, the blood under the influence of the arterial pulse enters and is impelled in a continuous, equable, and incessant stream through every part and member of the body, in much larger quantity than were sufficient for nutrition, or than the whole mass of fluids could supply.
Stranica 64 - ... opinion is the source of opinion. Democritus with his atoms, and Eudoxus with his chief good which he placed in pleasure, impregnated Epicurus ; the four elements of Empedocles, Aristotle; the doctrines of the ancient Thebans, Pythagoras and Plato; geometry, Euclid.
Stranica 10 - The attempt to explain by the Cuvierian principles the facts of special homology on the hypothesis of the subserviency of the parts so determined to similar ends in different animals...
Stranica 55 - ... the arrangement and intimate structure of the valves in particular, and of the other parts of the heart in general, with many things besides, I frequently and seriously bethought me, and long revolved in my mind, what might be the quantity of blood which was transmitted, in how short a time its passage might be effected, and the like...
Stranica 55 - ... that I not only fear injury to myself from the envy of a few, but I tremble lest I have mankind at large for my enemies, so much doth wont and custom become a second nature. Doctrine once sown strikes deep its root, and respect for antiquity influences all men. Still the die is cast, and my trust is in my love of truth and the candour of cultivated minds.

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