INDEX 



reflecting telescope, ii. 255; 

 achromatic, invented, ii. 256. 



Telluric structure, the rigidity of, 

 v. 212. 



Temperature, iii. 302, 303, 305, 

 306; means employed to mod- 

 ify, v. 201. 



Tennant's discovery of chloride 

 of lime, iv. 26. 



Tetanus, discovery of toxine for, 

 iv. 242. 



Thales, the Milesian, foretold the 

 eclipse which stopped a battle 

 between the Lydians and the 

 Medes, i. 103; one of the 

 Seven Wise Men of Greece, 

 i. 104; a link connecting the 

 learning of the old Orient with 

 the scholarship of the new 

 Occident, i. 105; predicted the 

 great eclipse, 585 B.C., i. 106; 

 the father of Greek astronomy, 

 i. 106; a primitive geometer, i. 

 107; is credited with five 

 geometrical truths, i. 108; in- 

 ventor of science of triangula- 

 tion, i. 1 08; thought the 

 eclipse of the sun a purely 

 natural phenomenon, i. 109; 

 a pioneer philosopher of the 

 West, i. 115. 



Theophrastus, did for the vege- 

 table kingdom what Aristotle 

 did for the animal, i. 188; his 

 work on the mineral kingdom 

 is the most notable that was 

 produced in antiquity, ibid. 



Thermometer invented by Gal- 

 ileo, ii. 119. 



Thinite dynasty, the first, i. 

 36- 



Thirteenth-century medicine, ii. 



33- 



Thompson, Benjamin (Count 

 Rumford), an American, 

 founder of the Royal In- 

 stitution of Great Britain, v. 



3. 3 1 - 



Thompson, J. J., and the nature 

 of electricity, v. 92-97; and 

 the source of energy of radio- 

 activity, v. 107 ; his hypotheses 



of the instability of the atom, 

 v. 109. 



Thompson, R. Campbell, his 

 studies of the astronomical 

 tablets of the Assyrians, i. 64; 

 thought the Chaldean astrono- 

 mers had a kind of machine 

 for reckoning time, i. 67. 



Thomson, Thomas, adopted the 

 atomic view of Dalton, iv. 44. 



Thorium, discovery of the radio- 

 active properties of, v. 100. 



Thundering Legion, the, i. 296. 



Torricelli, disciple of Galileo, ii. 

 120; discovers that "suction" 

 is air pressure, ii. 120; his 

 barometer, ii. 122; discovery 

 in hydraulics, ii. 123. 



Toxine, the discovery of, for 

 tetanus and diphtheria, iv. 242. 



Transmutation of species, iv. 149, 

 150, 152, 153, 159, 161, 167, 

 170, 174, 176. 



Treviranus, Gottfried Reinhold, 

 motion of cell contents, redis- 

 covered in 1807 by, iv. 124; 

 coined the word "biology," 

 iv. 160. 



Trichina spiralis, Owen's dis- 

 covery of, iv. 207. 



Trichinosis, the subject of, iv. 

 207. 



"Tropical centres," Waller and 

 the study of, iv. 280. 



Trotula, woman physician, ii. 29. 



Tuke, Dr. William, leader in re- 

 forms for care of insane, iv. 



24$. 



Turpm, studies of micro-organ- 

 ism, iv. 219. 



Tycho Brahe, great Danish as- 

 tronomer, ii. 65; observation 

 of comets, ii. 67; method of 

 finding latitude, ii. 68; re- 

 discovery of "moon's varia- 

 tion," ii. 69; explanation of 

 the new star in Cassiopeia, ii. 

 69. 



Tyndall, John, a recr 'it to the 

 Darwinian theory, iv. 175; cor- 

 roborates the results of Pas- 

 teur, iv. 1 80. 



299 



