INDEX 



Scientific attitude of mind, v. 

 230-232. 



Scientific problems, some un- 

 solved, v. 203-229. 



Scrope, G. Poulett, claimed that 

 the highest mountains were 

 masses of volcanic matter, iii. 

 132; his theories of rock 

 formations, iii. 134. 



Serum-therapy, iv. 240; the es- 

 tablishment of, iv. 244. 



Serum treatment for serpent- 

 poisoning, v. 184. 



Servetus, discoverer of pulmo- 

 nary circulation, ii. 168. 



Seven Wise Men of Greece, i. 104. 



Seyerinus, Marcus Aurelius, Ital- 

 ian surgeon, ii. 185. 



Sewage - disposal, the famous 

 system of Berlin, v. 199; the 

 system of the Parisians, v. 200. 



Sextant, invention of the, ii. 257. 



Shooting-stars, iii. 55; the great 

 shower of 1833, hi. 171; the 

 same in kind and origin as 

 meteors, iii. 172. 



Sibu, whose contorted attitudes 

 caused the irregularities of the 

 earth's surface, i. 43. 



Signatures, doctrine of, ii. 160. 



Simpson, Sir J. Y., discovers the 

 anaesthetic power of chloro- 

 form, iv. 217. 



Sloane's, Sir Hans, collection, 

 purchased by British govern- 

 ment, v. 4; finest in existence, 



v - 5- 

 Small-pox, Jenner's discovery 



of inoculation for preventing, 



iv. 190-196. 

 Smith, William, and fossil shells, 



iii. 74; his discovery that 



fossil rocks are arranged in 



regular systems, iii. 75. 

 Snell, Willebrord, discovers the 



law of refraction, ii. 119. 

 Societies, scientific, ii. 198. 

 Solar and telluric problems, v. 



205-213. 

 Solubility, as explained by Ost- 



wald and Mendeleef, v. 218- 



219. 



Sothic cycle measured by the 

 heliacal rising of Sotnis, i. 

 40. 



Sothis, the Egyptian name of the 

 dog-star Sirius, the rising of 

 which in the morning sky 

 marked the beginning of the 

 new year, i. 38. 



South, James, the discoverer of 

 scores of hitherto unrecog- 

 nized fixed stars, iii. 58. 



Spallanzani, Lazzaro, rival of 

 Hunter, iv. 86 ; studies of 

 spontaneous generation, iv. 

 87; his chemical theory of 

 digestion, iv. 88; elaborates 

 upon experiments of Reaumur, 

 iv. 89; theory of gastric juices, 

 ibid.; experiments in mysteries 

 of respiration, iv. 93. 



Spectroscope, the, perfected by 

 Kirchhoff and Bunsen, iii. 62; 

 iv. 69; wonderful revelations 

 of, iii. 63; the results of the 

 studies of Rutherfurd and 

 Secchi, iii. 64; what it reveals 

 of the nature and condition of 

 the stars, iii. 65; it discovered 

 the existence of "dark stars"; 

 its power to record the actual 

 motion of stars, iii. 66; the 

 speed of an invisible planetary 

 body may be determined by 

 it, iii. 67; it determined the 

 character and composition of 

 the nebulas, iii. 69; confirms 

 the theory that meteorites and 

 shooting-stars are one in kind 

 and origin, iii. 172; and 

 photography, iv. 68-72 ; utility 

 of, rendered complete, iv. 70; 

 observation of the sun and 

 stars by, iv. 71. 



Spencer, Herbert, his definition 

 of science, i. 3; lent his in- 

 fluence to the Darwin cause, 

 iv. 175; belief in transmuta- 

 tion of species, iv. 176; and 

 the disputed question of " spon- 

 taneous" variations, iv. 178; 

 his Principles of Psychology, 

 iv. 268. 



2Q7 



