KEY AND INDEX 



Menant, Joachim, on the devel- 

 opment of a rudimentary 

 science of natural history 

 among the Babylonians, 1, 75. 



Mendeleeff, Dmitri, attention 

 drawn to the "law of oc- 

 taves," which he elaborated 

 into a famous system, under 

 title of the "periodic law," 

 4,68. 



Mercator, Gerardus, brought 

 the art of map-making to 

 perfection, 7, 30. 



Mercury- Vapor light, 6, 236. 



Mergenthaler, Ottmar, the lino- 

 type machine invented by, 8, 

 142. 



Mesopotamia, named by the 

 Greeks, 1, 56; its civilization 

 fully on a par with that of 

 Egypt 1, 59; its earliest in- 

 habitants were an alien race, 

 1, 60 : the scientific attain- 

 ments o its inhabitants, the 

 Babylonians and Assyrians, 1, 

 61-85. 



Metamorphosis of parts, 4, 140; 

 Goethe studies of, in plants, 

 4, 140, 45; extended to the 

 animal kingdom, 4, 146. 



Meteorites, the "fire ball" of 

 1803, 3, 1 68; Jean Baptiste 

 Biot's investigation of, 3, 

 169; scientists differed as to 

 its origin, ibid.; Chladni 

 thought that they were one 

 in kind and origin as the 

 "shooting-stars," 3, 170; the 

 great shower of 1833, 3, 171; 

 the "miracle" of the falling 

 stone, 3, 172; invoked by Dr. 

 Mayer to explain the contin- 

 ued heat of the sun, 5, 206. 



Meteorology, The New Science 

 of, Chapter V, 3, 168. 



Methods of living and working 

 at beginning of nineteenth 

 century compared with those 

 at end, 6, 19-24. 



Meyer Lothar, attention drawn 

 to the "law of octaves," 4, 

 68. 



Mezzotint, invented by Van 

 Siegen, 8, 196. 



Michelangelo, his famous aphor- 

 ism that trifles make perfec- 

 tion illustrated by Watt's 

 modification of the steam- 

 engine, 6, i 06. 



Micrometer, the, Huygens* in- 

 vention of, 2, 254. 



Microscope, invented by Jensen, 

 2, 77; in the Newtonian 

 period, 2, 258; attempts to 

 improve the, 4, 109, no, in; 

 Dr. Amici's reflecting, 4, 112; 

 Amici's improved compound, 

 4, 113; shape of red cor- 

 puscles settled by use of the, 

 4, 114- 



Milky Way explained by Galileo, 

 2,79; studied by Herschel, 3, 

 24. 



Miller, in 1788, in associa- 

 tion with Symington and 

 Taylor constructed a boat 

 consisting of two hulls, with a 

 paddle-wheel between them 

 worked by a steam-engine, 7, 

 67. 



Mineral Depths, The, Chapter 

 XII, 6, 242. 



Mining, early methods of, 6, 

 242 ; prospecting, 6, 243 ; 

 geology as an aid to pros- 

 pecting, 6, 246; use of the 

 diamond drill in, 6, 247; 

 problems to be consid- 

 ered in mining, 6, 247; 

 dangerous gases in mines, 6, 

 248; safety lamp invented 

 by Sir Humphry Davy, 

 249; methods of illuminating 

 mines, 6, 251; ventilation of 

 mines, 6, 252; drainage in, 

 6, 253; electric machinery 

 used in, 6, 253; use of elec- 

 tric drills, 6, 254; traction in 

 mining, 6, 256; advantages 

 of electric locomotives in, 6, 

 259; electric pumps used in, 

 6, 263; use of electricity in 

 coal mining, 6, 266; coal- 

 cutting machines, 6, 267; the 

 Lake Superior mines, 6, 272; 

 "overhead scooping," "cav- 

 ing," and "milling," 6, 273; 

 "open-pit" mining, 6, 274; 



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