Fifty Years of Science: Being the Address Delivered at York to the British Association August 1881

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Macmillan and Company, 1882 - Science - 90 pages
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Page 60 - The whole sky from the zenith to the horizon becomes one molten mantling sea of colour and fire ; every black bar turns into massy gold ; every ripple and wave into unsullied shadowless crimson and purple and scarlet, and colours for which there are no words in language and no ideas in the mind — things which can only be conceived while they are visible...
Page 5 - The theory is based on four axioms:— " 1. That no two animals or plants in nature are identical in all respects. " 2. That the offspring tend to inherit the peculiarities of their parents. ''3. That of those which come into existence, only a small number reach maturity. "4. That those, which are, on the whole, best adapted to the circumstances in which they are placed, are most likely to leave descendants.
Page 61 - ... for which there are no words in language, and no ideas in the mind, — things which can only be conceived while they are visible, — the intense hollow blue of the upper sky melting through it all, — showing here deep, and pure, and lightless, there, modulated by the filmy, formless body of the transparent vapor, till it is lost imperceptibly in its crimson and gold.
Page 33 - The prevailing feeling of geologists on this subject has been well expressed by Professor Le Conte, who says, " The whole theory of igneous agencies — which is little less than the whole foundation of theoretic geology — must be reconstructed on the basis of a solid earth.
Page 77 - Avogadro (1811), that equal volumes of gases under the same conditions of temperature and pressure contain equal numbers of molecules...
Page 51 - In place of an incandescent solid or liquid body transmitting light of all refrangibilities through an atmosphere which intercepts by absorption a certain number of them, such as our sun appears to be, we must probably regard these objects, or at least their photo-surfaces, as enormous masses of luminous gas or vapour ; for it is alone from matter in the gaseous state that light consisting of certain definite refrangibilities only, as is the case with these nebulae, is known to be emitted.
Page 71 - By the electric transmission of power, we may hope some day to utilise at a distance such natural sources of energy as the Falls of Niagara, and to work our cranes, lifts, and machinery of every description by means of sources of power arranged at convenient centres. To these applications the brothers Siemens have more recently added the propulsion of trains by currents passing through the rails, the fusion in considerable quantities of highly refractory substances, and the nse^of electric centres...
Page 49 - ... nucleus of the sun, which emits a brilliant continuous spectrum containing rays of all degrees of refrangibility. When the light of this intensely heated nucleus is transmitted through the incandescent...
Page 10 - Kowalevsky with respect to the existence of a notochord in the Ascidia, which have been confirmed by Kupfer and others, have produced a change little short of revolutionary in embryological and zoological views, leading as they do to the support of the hypothesis that the Ascidian is an earlier stage in the phylogenetic history of the mammal and other Vertebrates.

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