A HISTORY OF SCIENCE 



phlogiston theory, iv. 31; ex- 

 periments in respiration, iv. 



93- 



Law of valency, iv. 63. 



Leeuwenhoek discovers bacteria, 

 ii. 179. 



Leibnitz, estimate of his work, 

 ii. 197; theory of monads, ii. 

 198; president of the Royal 

 Academy of Sciences at Berlin, 

 ii. 202. 



Leidy, Joseph, found the cysts of 

 trichina in pork, iv. 207. 



Leonardo da Vinci, ii. 47; denial 

 of the sun's motion, ii. 48; 

 his steam-engine, ibid.; his 

 camera obscura, ibid.; his geo- 

 logical observations, ii. 50. 



Lepsius, extended the study of 

 the famous trilingual inscrip- 

 tions of the Rosetta Stone, i. 

 2 7 ; determines that the ancient 

 stadium was one hundred and 

 eighty meters, i. 231. 



Le Sage, his theory of gravitation, 

 v. 214. 



Lewes, George Henry, his transla- 

 tion of Ritter's rendering of 

 part of the poem of Parmenides 

 concerning the origin of man, 

 i. 131. 



Leyden jar, invention of, by 

 Von Kleist, ii. 280. 



Liebig, isomerism proved by, iv. 

 62; school of physiological 

 chemistry, under guidance of, 

 iv. 128; his studies of animal 

 heat, iv. 131-135; his doctrine 

 of fermentation, iv. 219. 



Light, heat, and atmospheric 

 pressure, ii. 117. 



Light, the wave theory of, 

 Thomas Young and, iii, 215- 

 225; endorsed by Fresnel and 

 Arago, iii. 226; opposition to, 

 ibid.; accepted by French 

 Academy, iii. 227. 



Linde, Professor, improved meth- 

 od of liquefaction of gases, v. 

 .44- 



Linnaeus, Carolus, member of 

 Royal Swedish Society, ii. 



203; life and work, ii. 299- 



33- 



Lippershey, Johannes, inventor 

 of the telescope, ii. 78, 252. 



Liquefaction of gases, v. 40-46; 

 improved methods of, v. 44; 

 principles and experiments, 

 v. 46-60; results and antic- 

 ipations of the, v. 61-72; use 

 of, in the refrigeration of foods, 

 v. 61. 



Liquefied air, v. 45, 46, 63-67. 



Liquid chlorine, Faraday pro- 

 duces, v. 39. 



Lister, Dr. Joseph (Lord Lister), 

 discovery of antisepsis, iv. 

 229; and surgery, iv. 231; 

 president of the Royal Society 

 of London, v. 19. 



Lister, Joseph Jackson, experi- 

 ments with the microscope, iv. 

 112; studies of lenses, iv. 113; 

 shape of the red corpuscles 

 settled by, iv. 114. 



Liver, the, important share of, 

 in preparing food for ab- 

 sorption, iv. 130; not a duct- 

 less organ, iv. 137; blood 

 undergoes a change in passing 

 through, iv. 138; cells, ibid. 



Living forms, question as to, on 

 other worlds, v. 220. 



Lockyer, Sir Norman, his "me- 

 teoric hypothesis," iii. 70; does 

 not meet with unanimous 

 acceptance, iii. 71; his deduc- 

 tions from observations of the 

 sun and stars through the 

 spectroscope, iv. 71; spectro- 

 scopic study of sun and stars, 

 v. 73; his theories, v. 75; 

 study of sun-spots, v. 76; 

 studies of the reverse lines of 

 spectrum, v. 78; Perseus dis- 

 covered by, v. 79, 80. 



Lodge, Sir Oliver, and the in- 

 stability of the atom, v. 109. 



Logical induction versus hasty 

 generalization, v. 239-242. 



Long, Dr. Crawford W., claim to 

 the discovery of ether, iv. 215. 



Lotze, Dr. Hermann, his Medi- 



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