INDEX 



Farman, Mr. Henry, an early fol- Gorgas, Col. W. C., makes the 



lower of the Wrights in flying, Panama Canal Zone salubrious, 



302. 247. 



Fay, his studies of deaf mutism, Guinea pigs, used by Prof. Castle 



205. to show Mendelian heredity, 

 Finlay, Dr. Chas. J., advanced 196. 



theory that the mosquito trans- Gyroscope, how its action may ex- 



mits yellow fever, 249. plain the position of planetary 



Finsen, Dr. N. R., treats lupus axes, 13; its feats of balancing 



with the ultraviolet ray, 240. outlined, 258; how it works, 

 Finsen Ray, its use in destroying 257 ; used by Foucault to demon- 

 bacteria, 240. strate the earth's motion, 261; 

 Fish, the eggs of, experimented attempts to use it as a balancer, 



with by Dr. Driesch; a single 262; used to steady ships at sea, 



egg caused to produce four in- 266; as a stabilizer of land ve- 



dividuals, 147. hides, 271 ; to stabilize the aero- 

 Flea, the agent of transmission of plane, 274. 



the plague, 249. Gyroscope compass, 262 ; the prin- 



Flowers, why they have scent and ciple on which it works, 263 ; 



color, 142. perfected by Mr. Sperry and 



Fly, the common house, as an installed on battleships, 265. 



agent in transmitting disease, Hale, Professor George E., his 



251. spectroheliograph, 37; discovers 



Flying machine, the true, 294. Zeeman effect in the light from 



Fournier d'Albe, Dr., makes light the sun spots, 105; explains 



audible with his optophone, 311. tentatively the relation between 



Fowl, the barnyard, used by Prof. terrestrial magnetism and sun 



Punnett to show Mendelian he- spots, 105. 



redity, 197. H alley, suggested the transit-of- 



Frog, its eggs caused to develop Venus method of measuring the 



without fertilization, 145. sun's parallax, 74. 



Gager, Prof. C. S., treats the pol- Hammer, Mr. Wm. J., illustrates 



len of plants with radium, 185. curious properties of selenium, 



Galton Institute of Eugenics, 199. 313. 



Gamma ray, a type of X-ray, 114. Harrison, Dr. R. S., the first to 



Gas or oil engine, developed by prove the feasibility of growing 



Otto and Daimler, 281 ; a new tissues outside the body, 165. 



type developed by Diesel, 280. ,H<askine, his hint about preventive 



Germicide, light as a, 239. inoculation, 209. 



Giants, a possible explanation of Helium, found by spectroscope in 



their origin, 149. the stars, 23; its atom, charged 



Gill, Sir Davi4, began an elaborate with positive electricity, is the 



spectrographic investigation to alpha particle, 114; seemingly 



determine the solar parallax, 80. formed in the laboratory in an 



Goddard, Dr. H. H., studies of electric bulb, 123. 



heredity of the feeble-minded, Herbst, Professor, grows new 



206. eyes on crustaceans, 153. 

 Goldstein, first observed the canal Heredity, Mendelian, 190 ; and the 



rays, 121. human race, 199; and Eugenics, 



333 



