MIRACLES OF SCIENCE 



Toxins and antitoxins, how ex- 

 plained by side-chain theory, 

 227. 



Transmutation of elements, seem- 

 ingly effected in the laboratory 

 by Ramsay, iCollie, and Pat- 

 terson, 122 ; explanation of the 

 phenomenon by Sir J. J. Thom- 

 son, 124. 



Tropical diseases, studied at Cam- 

 bridge by Dr. Nuttall, 244. 



Tropical fevers, the conquest of, 

 248. 



Trypanosome, the protozoal germ 

 that causes sleeping sickness, 

 230. 



Tuberculin, Koch's discredited 

 remedy shown to be of value, 

 216. 



Turner, Professor Arthur B., de- 

 scribes the complications that 

 attend the measurement of the 

 sun's parallax by the spectro- 

 scopic method, 79. 



Typhoid fever, the inoculation 

 against, 213; losses due to, es- 

 timated by Dr. Kober, 214; a 

 scourge that is controlled by 

 Wright's vaccine, 251. 



"Typhoid fly," its banishment 

 from the Panama Canal Zone, 

 250. 



Uhlenroth, Professor, his blood 

 tests, 160. 



Ultra-microscope, developed by 

 Zsigmondy and Siedentopf , 232 ; 

 possibly reveals hitherto un- 

 recognized germs, 233. 



Unit characters, according to Men- 

 del, 193. 



Universe, Charting the, Chapter 

 II, 29. 



Universe, stellar, its magnitude, 

 31; the scheme of, 57; it may 

 have the structure of a vast 

 spiral nebula, 58. 



Uranium, discovered by Henri 

 Becquerel, 113. 



Uranus, its liquid or gaseous 



state, 10; invisible to the naked 

 eye, 34; its density 1.22 that of 

 water, 84, 



Vaccine Therapy, estimated by 

 Sir Almroth Wright, 208; as 

 developed by Wright, 209; es- 

 timated by Dr. Thompson, 209; 

 its principles and application, 

 210; the explanation of its effi- 

 ciency, 211. 



Vaccine, anti-typhoid, originally 

 used in South African war, now 

 universally employed, 213; used 

 as a curative remedy, 219. 



Vaccines and microbes, 208. 



Vaniman, his ill-fated attempt to 

 make a transoceanic aerial voy- 

 age, 291. 



Van't Hoff, J. H., his theory of 

 osmosis, 103. 



Variation, spontaneous, usually in- 

 explicable, 184; the basis of the 

 origin of favored races, 181. 



Vega, is approaching us, but is 3*5 

 light years distant, 43; will be 

 our pole star, 12,000 years from 

 now, 56 ; its thermal effect meas- 

 ured by Professor Nichols, 111. 



Venus, observation of its transit 

 not a reliable method of meas- 

 uring the sun's parallax, 75 ; its 

 mass about 8/10 that of the 

 earth, 85; the question of its 

 habitability, 90 ; its period of ro- 

 tation seemingly determined by 

 De Vico, 90; its rotation period 

 claimed by Schiaparelli to coin- 

 cide with its year, 90. 



Vertebrates, the arachnid theory 

 of their origin, as expounded by 

 Professor Patton, 170. 



Vogel, discovered .first spectro- 

 scopic binary, 96. 



Vries, Prof. Hugo de, of Amster- 

 dam, his theory of mutation, 

 182; discovery of Mendel by, 

 195. 



Warship, the U. S. S. Warden 

 stabilized by the Sperry gyro- 

 scope, 269. 



342 



