INDEX 



Psychology, experimental, its advances 

 during the present century, 395 

 -432 ; the reform in the treatment 

 of the insane, 395-401 ; discov- 

 eries regarding the nervous sys- 

 tem, 401-407 ; establishment and 

 development of psycho- physics, 

 407-417 ; discoveries in brain phys- 

 iology, 417-423 ; establishment 

 and development of brain histol- 

 ogy, 423-432. 



Psycho-physics, discoveries relating 

 to, 407-417. 



Putrefaction and fermentation, their 

 processes investigated, 375-380. 



RAIN, theories regarding, and the de- 



termination of its causes, 167-172. 

 Ramon y Cajal, S., his discoveries re- 



lating to nerve cells, 430, 431, 432. 

 Ramsay, Andrew Crombie, how he 



accounted for many of the lake 



basins, 153. 

 Rankine, William John Macquorn, 



his researches prove the law of the 



conservation of energy, 223, 224, 



225. 

 Remak, Professor, his microscopical 



researches of the brain and nervous 



system, 404, 425. 

 Respiration, its processes investigated, 



39-41, 349, 350. 

 Rontgen, Professor, and the X ray, 



1, 2, 228. 

 Rosse, Lord, his studies of nebula) 



through his six-foot reflector, 80. 

 Roux, Dr., his services in the cause 



of serum-therapy, 392, 393. 

 Rum ford, Count, see Thompson, Ben- 



jamin. 

 Rush, Benjamin, his reform in the 



treatment of the insane, 395, 396. 

 Rutherford, Daniel, his discovery of 



nitrogen, 34. 

 Ruthorford, Lewis Morris, his spec- 



troscopic researches, 70, 72. 



SAlNT-HlLAIRE, GEOFFROY, his 



cacy of the transmutation theory, 

 104 ; opposes Cuvier's special-cre- 

 ation hypothesis, and partially en- 

 dorses the Lamarckian theory, 300, 

 318. 



Saturn, discoveries relating to, 49, 69. 



Savary, M., accounts for the elliptical 

 orbits of double stars by the laws 

 of gravitation, 64. 



Scheele, Karl Wilhelm, his discovery 

 of oxygen, 31 ; his physiological ex- 

 periments, 40. 



Schiaparelli, Giovanni Virginio, his 

 establishment of the cometary 

 origin of meteors, 59. 



Schleiden, Matthias Jakob, his dis- 

 covery of the function of the cell 

 nucleus, 331, 332, 345; his discov- 

 ery of so-called free-cell formation, 

 343. 



Schmerling, Anton von, his impor- 

 tant discoveries at Engis, Westpha- 

 lia, 111. 



Schoenlein, J. L., discovers the cause 

 of favus, 365. 



Schultze, Max Johann Sigismund, dis- 

 covers the identical character of 

 vegetable and animal cells, 340. 



Schwann, Theodor, his cell theory, 

 331-336, 337, 338, 343, 345; his 

 discovery of pepsin, 347 ; his mi- 

 croscopical researches, 376, 404. 



Scientific problems, some unsolved, 

 433-457 ; regarding the sun and 

 earth, 435-442; in physics, 443 

 449 ; of life and the evolution of 

 living matter, 444-456 ; of anthro- 

 pology, 456, 457. 



Scrope, G. Poulett, his work account- 

 ing for the origin of volcanoes, liM. 



Secchi, Father Angelo, his researches 

 in spectrum analysis, 70, 72. 



Sedgwick, Adam, his classification of 

 transition rocks into chronological 

 groups, 138. 



Serum-therapy, discovery and devel- 

 opment of the system of, 390- 

 394. 



Shooting-stars, determination of their 

 origin, 59, 60. 



Simpson, Sir J. Y., his discovery of 

 chloroform as an anaesthetic, 374. 



Sirius and its " invisible " companion, 

 74, 75. 



Six, Mr., his theory of dew formation, 

 171. 



Small-pox, Jenner's discovery of the 

 means of its prevention, 42, 43. 



473 



