A HISTORY OF SCIENCE 



Smith's views, iii. 83; on 

 catastrophism, iii. 85; skulls 

 the fossils discovered by 

 Dr. Schmerling, iii. 103; his 

 classification of the animal 

 kingdom, iv. 102; his law 

 of co-ordination, iv. 107; his 

 opposition to the transmuta- 

 tion doctrines, iv. 153, 158. 

 Cyclones, iii. 199-205; a system 

 of whirls, iii. 202; primary 

 cause of, iii. 203; anti-, iii. 204. 



DAGUERRE, Louis J. M., brought 

 photography to perfection, iv. 

 70. 



Daguerreotype perfected by 

 Louis Daguerre in 1839, iv. 70. 



D'Alembert, Jean le Rond, 

 determined the ratio of the 

 attractive forces of the sun 

 and moon, and the mutation 

 of the axis of the earth, iii. 

 15. 



Dalton, John, and the atomic 

 theory, iv. 38-46; first con- 

 ception of the chemical atom, 

 iv. 39; his theory disputed, iv. 

 41 ; his theory adopted, iv. 

 44; predicted the liquefaction 

 of gases, v. 42. 



Daniell, John Frederick, pro- 

 duced the cell which bears his 

 name, iii. 236. 



Darwin, Charles Robert, his 

 Origin of Species, iii. 95; his 

 work a revelation to the 

 geological world, iii. 96; his 

 work on doctrine of evolu- 

 tion, iv. 167; his most avail- 

 able field, iv. 168; years spent 

 in gathering facts, iv. 171; 

 joint paper of, and Wallace, 

 presented to the Linnasan 

 Society of London, iv. 173; 

 makes converts of Hooker, 

 Lyell.and Huxley, iv. 174; en- 

 tombed in Westminster Abbey, 

 iv. 178; statue of, in Museum 

 of Natural History, v. u; 

 computations as to the earth's 

 ultimate fate, v. 212. 



Darwin, Dr. Erasmus, his theory 

 concerning the aurora bore- 

 alis, iii. 173; concerning the 

 vapor of water, iii. 177; and 

 vegetable respiration, iv. 94- 

 99 ; his Botanic Garden, iv. 147 ; 

 his Zoonomia and Temple of 

 Nature, iv. 148; his suspicions, 

 ibid.; at his death his idea of 

 transmutation of species still 

 an unsubstantiated dream, iv. 

 149. 



Darwinian theory, greatest scien- 

 tific conception of the nine- 

 teenth century, v. 241. 



Da Vinci, Leonardo, his theories 

 concerning the creation similar 

 to those expressed by Xenoph- 

 anes two thousand years be- 

 fore, i. 129. 



Davy, Sir Humphry, produced 

 the first electric lamp, iii. 234; 

 showed that labor may be 

 transformed into heat, iii. 

 255; his experiment of melting 

 ice by friction, iii. 277; heat a 

 manifestation of motion among 

 particles of matter, iii. 294; 

 and electro-chemistry, iv. 46- 

 53; brilliant researches with 

 his voltaic battery, iv. 47 ; his 

 famous Bakerian lecture, iv. 

 48; his theory of binary 

 composition of chemical com- 

 pounds, iv. 53; experiments in 

 the mysteries of respiration, 

 iv. 93; experiments with sul- 

 phuric ether, iv. 209-212; pro- 

 fessor of chemistry in Royal 

 Institute, v. 34; his science 

 of electro-chemistry, v. 36; ex- 

 periments with low tempera- 

 tures, v. 40; his suggestion re- 

 sults in production of liquid 

 chlorine, v. 41; experiments 

 upon gases, v. 42. 



Dawes, Rev. W. R., one of the 

 discoverers of the inner or 

 crape ring of Saturn, iii. 44. 



Day of Bel, the, a series of 

 tablets written in the time of 

 Sargon I. 3800 B.C., i. 67. 



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