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Who said: “Dangerous... to take shelter under a tree, during a thunder-gust. It has been fatal to many, both men and beasts.”
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Home > Category Index for Science Quotations > Category Index S > Category: Substitution

Substitution Quotes (6 quotes)

Already the steam-engine works our mines, impels our ships, excavates our ports and our rivers, forges iron, fashions wood, grinds grain, spins and weaves our cloths, transports the heaviest burdens, etc. It appears that it must some day serve as a universal motor, and be substituted for animal power, waterfalls, and air currents.
'Rιflexions sur la puissance motrice du feu' (1824) translated by R.H. Thurston in Reflections on the Motive Power of Fire, and on Machines Fitted to Develop that Power (1890), 38.
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I have always considered that the substitution of the internal combustion engine for the horse marked a very gloomy milestone in the progress of mankind.
Speaking in the House of Commons (24 Jun 1952), as cited in Jack House (ed.), Winston Churchill, His Wit and Wisdom: Selections from His (1965), 115.
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I have considered the two terms you want to substitute for eisode and exode, and upon the whole I am disposed to recommend instead of them anode and cathode. These words may signify eastern and western way, just as well as the longer compounds which you mention … I may mention too that anodos and cathodos are good, genuine Greek words, and not compounds coined for the purpose.
Letter to Michael Faraday (25 Apr 1834). Quoted in I. Todhunter (ed.), William Whewell: An Account of His Writings with Selections From His Literary and Scientific Correspondence (1876), Vol. 2, 179.
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I was an impostor, the worthy associate of a brigand, &c., &c., and all this for an atom of chlorine put in the place of an atom of hydrogen, for the simple correction of a chemical formula!
Chemical Method (1855), 203.
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The law of conservation rigidly excludes both creation and annihilation. Waves may change to ripples, and ripples to waves,—magnitude may be substituted for number, and number for magnitude,—asteroids may aggregate to suns, suns may resolve themselves into florae and faunae, and florae and faunae melt in air,—the flux of power is eternally the same. It rolls in music through the ages, and all terrestrial energy,—the manifestations of life, as well as the display of phenomena, are but the modulations of its rhythm.
Conclusion to lecture 12 (10 Apr 1862) at the Royal Institution, collected in Heat Considered as a Mode of Motion: Being a Course of Twelve Lectures (1863), 449.
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The Post Office Committee of the House has referred to a sub-committee all the bills authorizing the building or buying of telegraph lines for the purpose of establishing a postal telegraph—that is, of sending mails by electricity ... All is done by contract ... with the carriage of mails by steam power [railroads] ... It does not appear why there should be any difference of principle because of the substitution of electricity for steam.
[Foreshadowing email.]
'Mails by Electricity', New York Times (26 Apr 1884), 4. A previous proposal for U.S. Government ownership of a test postal telegraph received an adverse Report of the House Post Office Committee, reported in 'Postal Telegraph', New York Times (25 Feb 1869).
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Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
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- 90 -
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- 80 -
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- 70 -
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- 60 -
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- 50 -
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- 40 -
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- 30 -
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- 20 -
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