INDEX 



Days, lucky and unlucky, i. 44, 

 45, 46. 



De Bary, Heinrich, studies of 

 protoplasm, iv. 125. 



De Jussieu, Antoine and Bernard 

 founders of the "natural sys- 

 tem in botany," ii. 303. 



De Lacaille, Nicolas Louis, his 

 measurement of the French 

 arc of the meridian, iii. 13; the 

 question of the shape of the 

 earth, iii. 14. 



De Lamarck, Jean Baptiste, the 

 work of, iv. 151; his idea of 

 transmutation of species, iv. 

 152; coined the word "biol- 

 ogy," iv. 160. 



Delambre, Jean Baptiste Joseph, 

 determined the orbit of the 

 planet Uranus, iii. 16. 



Delitzsch, Professor, his Assyrian 

 grammar, i. 96. 



De Maillet, and transmutation of 

 species, iv. 149. 



Democedes, the first physician 

 of whom we have any trust- 

 worthy history, i. 172. 



Democritus, a dreamer and a 

 thinker, i. 162; his theory of 

 atoms curiously foreshadowed 

 nineteenth-century knowledge, 

 i. 163; atoms differ from each 

 other only in size and "shape, i. 

 164; the quibble over the word 

 quality, i. 166; a forecast of 

 the chemistry of the future, i. 

 167, 169; a believer in omens, 

 i. 170. 



De Morgan, a worker in the field 

 of Egyptian exploration, i. 28. 



De Ronge\ a follower of Dr. 

 Young, i. 27; his theories con- 

 cerning the symbols of the 

 Phoenician alphabet, i. 87. 



Desaguliers, Dr. Joseph, electri- 

 fies running water, ii. 274. 



Descartes, statement of the first 

 law of motion, ii. 99; formu- 

 lates law of refraction, ii. 119; 

 estimate of his work, ii. 193; 

 his physiological views, ii. 

 194; theory of vortices, ii. 195. 



Desmoulins, Louis Antoine, his 

 studies of the brain, iv. 249. 



Devaine, discovery that anthrax 

 is caused by bacteria, iv. 227. 



Development of the alphabet, i. 

 86-102. 



Deville, Ste. - Claire, dissolution 

 and reformation of molecules 

 fully appreciated by, iv. 61. 



Dewar, Professor James, ex- 

 periments with low tempera- 

 tures, v. 39; liquefied "hydro- 

 gen," v. 43; his vacuum vessel 

 for holding liquefied gases, v. 

 53, 54, 68. 



Digestion, chemical theory of, iv. 

 88-91; function of the glands 

 that act in the process of, iv. 

 129, 130. 



Diodorus, the Sicilian, i. 56; left 

 us a striking summary, i. 77. 



Diogenes Laertius, his story of 

 the athletic prowess of Pythag- 

 oras, i. 112. 



Diphtheria, discovery of toxine 

 tor, iv. 242. 



Disputed question of "spon- 

 taneous" variations, iv. 178; 

 Haeckel and Spencer and the, 

 ibid. 



"Dissociation," the dissolution 

 and reformation of molecules 

 in a substance, iv. 61. 



Doctrine of irritability, Haller's 

 greatest contribution to medi- 

 cal science, iv. 74. 



Dohrn, Dr. Anton, founder of the 

 Marine Biological Laboratory 

 at Naples, v. 121; theory of 

 the type of invertebrate an- 

 cestor, v. 137. 



Dove, Heinrich W., his studies 

 in climatology, iii. 199, 200. 



Draper, Dr. Henry, made the 

 first successful photograph of 

 a nebula, iii. 67. 



Draper, Dr. John W., application 

 of photography to spectro- 

 scope, iv. 70. 



Driesch, Dr., studies of heredity 

 of, v. 131. 



Dubois, Dr. Eugene, the dis- 



279 



