INDEX 



the triangle and a circle, i. 

 209; his crude conception of 

 the idea of logarithms, i. 210; 

 his assumption about the size 

 of the sun and earth, ibid.; 

 his computation about the 

 number of grains of sand that 

 would be required to cover 

 the sphere of the sun's orbit, 

 i. 211. 



Argon, discovery of, v. 85, 86. 



Aristarchus, of antiquity, i. 218, 

 220, 221. 



Aristotle, his name a synonym 

 for Greek science a thousand 

 years after his death, i. 182; 

 his acceptance of the doctrine 

 of the spherical figure of the 

 earth, i. 183; a pathfinder in 

 the science of zoology, i. 185; 

 his divisions of the vertebrates 

 and invertebrates are accepted 

 by every one to-day, i. 186; 

 his classification of blood-bear- 

 ing animals and fishes not 

 far afield from modern divi- 

 sions, i. 187. 



Arnald of Villanova, physician, 

 ii. 34. 



Arzachel, "trepidation of the 

 fixed stars," ii. 16. 



Assyrian month, i. 64; sabbatical 

 days, i. 65. 



Assyrian scripture, restoration 

 of, iv. 293. 



Assy rio- Babylonian records, of 

 greater historical accuracy 

 than the Egyptian, i. 59; the 

 discrepancy between the Baby- 

 lonian and Egyptian years, 

 i. 65; tablets dealing with 

 magic make up a large pro- 

 portion of, i. 70. 



Astrologers, in Babylon they 

 were men of high rank and 

 their office was hereditary, i. 

 67; gave their chief attention 

 to the moon, i. 68. 



Astrology, ii. 141; present-day 

 survival, ii. 144; predictions of 

 Lilly, ii. 145 ; George Wharton, 

 ii. 150; other alleged pre- 



dictions, ii. 152, 155; cause of 

 the decline of astrology, ii. 155. 



Astronomer priests, their duty 

 was to predict the rising of 

 the Nile, i. 39. 



Asurbanipal, king of Assyria, 

 his contribution of tablets, i. 

 67 ; the great library of, in the 

 British Museum, iv. 295. 



Atmosphere, constituents of, v. 

 89. 



Atom, the vortex, speculation in, 

 v. 216; proof of the existence 

 of, v. 217. 



Atomic weights, iv. 64-67; cu- 

 rious relations between, of 

 various elements, iv. 66; their 

 relations with other charac- 

 teristics, iv. 67. 



Atoms, affinity of, v. 218; space 

 relations of, v. 219. 



Attempts to explain power of 

 gravitation, v. 214. 



Aurora borealis, the, Franklin's 

 explanation of, iii. 173; Eras- 

 mus Darwin's theory of, ibid.; 

 Biot's theory of, iii. 174; sun 

 spots linked with, iii. 175. 



Avenzoar, Arabian physician, ii. 

 26. 



Averrhoes, commentator of Aris- 

 totle, ii. 10, 26. 



Avicenna, Arabian "Prince of 

 Physicians," ii. 24. 



Avogadro, Amadeo, iv. 43; law, 

 iv. 57- 



BABYLON, its fame at its height 

 in the time of Herodotus, i. 

 57; in Babylonian science we 

 have the Eastern mind at its 

 best, i. 61. 



Babylonian astronomy, i. 61, 

 62; adjustment of the calen- 

 dar, i. 63-66. 



Babylonian medicine, the prac- 

 titioner of, occupied a position 

 of authority, i. 75; his emolu- 

 ments and penalties, i. 76. 



Babylonian science, estimates of, 

 i. 77; Canon Rawlinson on i. 

 82; spelled superstition, i. 85. 



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