GENERAL INDEX 



imponderable fluids as ap- 

 plied to light and heat, 6, 

 154; safety lamp of, 6, 250; 

 his experiments with the 

 camera obscura, 8, 221. 



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

 discoverers of the inner or 

 crape ring of Saturn, 3, 44. 



Day of Bel, the, a series of 

 tablets written in the time of 

 Sargon I., 3800 B.C., 1, 67. 



Days, lucky and unlucky, ac- 

 cording to Egyptian magi- 

 cians, 1, 44, 45, 46. 



De Bary, Heinrich, studies of 

 protoplasm, 4, 125. 



De Caus, Solomon, put into 

 effect the idea of utilizing 

 steam for the practical pur- 

 pose of raising water, 6, 83. 



DeForest, Lee, inventor of wire- 

 less telegraph system used 

 during the Russo-Japanese 

 war, 8, 65; instruments used 

 by, in experimenting with 

 wireless telephony, 8, 90. 



De Gary, Blasco, constructed 

 the model of a paddle-wheel 

 steamboat, 7, 66. 



Degen, invented a flying-ma- 

 chine with two parachutes, 



7, 245- 



De Jussieu, Antoine and Ber- 

 nard, founders of the "natural 

 system in botany," 2, 303. 



De Lacaille, Nicolas Louis, his 

 remeasurement of the French 

 arc of the meridian, in 1739, 

 3, 13; the question of the 

 shape of the earth, 3, 14. 



De Lamarck, Jean Baptiste, the 

 work of, 4, 151; his idea of 

 transmutation of species, 4, 

 152; coined the word "biol- 

 ogy," 4, 160. 



Delambre, Jean Baptiste Joseph, 

 determined the orbit of the 

 planet Uranus, 3, 16; inves- 

 tigated Alexandre's telegraph, 



8, 10. 



DeLaval, Dr. Gustav, turbine 

 engine of, 6, 131. 



Delitzsch, Professor, his Assy- 

 rian grammar, 1, 96. 



De Maillet, and transmutation of 

 species, 4, 149. 



Demeny, George, devised the 

 photoscope for reproducing 

 the motion of a man's lips, 

 8, 250. 



Democedes, the first physician 

 of whom we have any trust- 

 worthy history, 1, 172. 



Democritus, a dreamer and a 

 thinker, 1, 162; his theory of 

 atoms curiously foreshadowed 

 nineteenth-century k n o w 1- 

 edge, 1, 163 ; atoms differ from 

 each other only in size and 

 shape, 1 , 1 64 ; the quibble over 

 the word quality, 1, 166; a 

 forecast of the chemistry of the 

 future, 1, 167, 169; a believer 

 in omens, 1, 170. 



De Morgan, a worker in the 

 field of Egyptian explora- 

 tion, 1, 28. 



De Rouge, Vicompte E., a 

 follower of Dr. Young in the 

 study of Egyptian hierogly- 

 phics, 1, 27; theories of his 

 followers concerning the sym- 

 bols of the Phoenician alpha- 

 bet, 1, 87. 



Derrick, see Crane. 



Desaguiliers, Dr. Joseph, elec- 

 trifies running water, 2, 274; 

 originates story of invention 

 of beam connection for oper- 

 ating engine valves, by Hum- 

 phrey Potter, cock-boy, 6, 91- 



Descartes, Ren6, statement of 

 the first law of motion, 2, 99; 

 formulates law of refraction, 

 2, 119; estimates of his work, 

 2. 193; his physiological 

 views, 2, 194; theory of vor- 

 tices, 2, 195. 



Desmoulins, Louis Antoine, his 

 studies of the brain, 4, 249. 



Deutschland and Kaiser Wilhelm 

 II. German ships that for 

 several years held the ocean 

 record for speed, 7, 82. 



Devaine, discovery that anthrax 

 is caused by bacteria, 4, 227. 



Development of the Alphabet, 

 The, Chapter IV, 1, p. 86. 



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