GENERAL INDEX 



use of steam shovel in, 6, 



275- 

 "Missing link," the, no longer 



missing, 6, 173. 

 Mitchell, his theory about the 



Pleiades, 3, 35. 

 Mockhoven, Dr. D. von, his ex- 



rriments in photography, 

 233- 



Modern Astronomy, The Prog- 

 ress of, Chapter II, 3, 19. 



Modern Chemistry, The Be- 

 ginnings of, Chapter II, 4, 

 ii. 



Modern Development of Elec- 

 tricity and Magnetism, The, 

 Chapter VII, 3, 229. 



Modern Geology, The Origin 

 and Development of, Chapter 

 IV, 3, 116. 



Modern Sailing Ships, 7, 60. 



Modern Theories of Heat and 

 Light, Chapter VI, 3, 206. 



Mohammed, his liberal view of 

 medicine, 2, 23. 



Mohr, Karl Friedrich, held the 

 doctrine that heat, light, elec- 

 tricity and magnetism cannot 

 be created but only made 

 manifest and transformed one 

 into one another; remem- 

 bered, therefore, as one of 

 the originators of the doc- 

 trine of the conservation of 

 energy, 3, 257. 



Mohs, his scale of the hardness 

 of gems, 9, 301. 



Moissan, Professor, French phys- 

 icist who first manufactured 

 diamonds in the laboratory, 

 9, 328. 



Molecules, Lord Kelvin's esti- 

 mate of the size of those 

 floating in the air, 3, 298; 

 under ordinary circumstances 

 they are in a state of intense 

 but variable vibration, 3, 300; 

 they may be in the form of 

 gas, liquid, or solid, 3, 301; 

 experiments with Crookes's 

 radiometer, ibid.; conditions 

 under which they assume a 

 liquid form, 3, 302; and 

 molecular action, 6, 79. 



Mondino of Bologna, "the re- 

 storer of anatomy," 2, 37. 



Monier, Joseph, reinforced con- 

 crete first used by, 9, 197. 



Monorail Systems, 7, 191. 



Montague Mansion, first home 

 of British Museum, 5, 5; 

 erection of present building, 

 6, 6. 



Montgolfier, Stephen and Joseph 

 invented and sent up the 

 first balloon, 7, 231. 



Moon, studies of the, 3, 48; 

 speculations concerning, 3 , 

 49; the possible lengthening 

 of the day, 3, 50. 



"Moon's variation," determined 

 by Arabian astronomer, 2, 

 17; rediscovered by Tycho 

 Brahe, 2, 69. 



Moppert, translation of tablets 

 concerning birth-portents, 1, 



73- 



Morgagni, Giovanni Battista, 

 investigations in anatomy, 4, 

 76. 



Morrison, his translation of 

 Ritter's rendering of part of 

 the poem of Parmenides on 

 the origin of man, 1, 131. 



Morse, Samuel F. B., the father 

 of telegraphy, 8, 17; early 

 experiments of, 8, 19; his 

 first public exhibition of the 

 telegraph, 8, 20; his tele- 

 graph used for the first time, 

 8, 21 ; his claim to invention 

 contested, 8, 21; principle 

 of the Morse telegraph, 8, 23 ; 

 experiments with wireless tel- 

 egraphy, 8, 49; in connection 

 with Draper succeeded in 

 making the first photographic 

 portrait ever taken, 8, 226. 



Morton, Dr. W. T. G., experi- 

 ments with sulphuric ether 

 resulting in the demonstration 

 of its anaesthetic power, 4, 

 214. 



Moscicki, Professor, unsuccess- 

 ful experimenter in com- 

 mercial extraction of nitro- 

 gen from the air, 6, 306. 



Mount Janiculum, the greater 



