KEY AND INDEX 



number of public Roman 

 mills located near, 6, 71. 



Moving picture machines, 

 vitascope, vitagraph, bi- 

 ograph, phantoscope, kine- 

 matograph, 8, 251. 



"Mule," the spinning-machine 

 invented by Samuel >Cromp- 

 ton, 9, 32; the self-acting 

 mule, as invented by William 

 Eaton and improved by 

 Richard Roberts, 9, 35; the 

 modern self-acting mule, 9, 



Miiller, Johannes, studies in 

 embryology, 4, 122; his dis- 

 section of the only available 

 specimen of amphioxus, the 

 lowest of vertebrates, 6, 125. 



Multiple messages, 8, 25. 



Munck, localization of motor 

 centres, 4, 274. 



Mundy, Arthur J., his experi- 

 ments with submarine sig- 

 naling, 7, 85. 



Murdoch, William, his inven- 

 tion of a system of gas light- 

 ing, in 1798, 6, 207; the 

 automobile of, 7, 158. 



Muscles, 4, 137; extensor, levers 

 of the first class, 6,30; flexor, 

 levers of the third class, 6, 

 31. (See also muscular sys- 

 tem.) 



Muscular system, the oldest 

 machine in existence, com- 

 plexity of, governed by laws 

 that apply] to other mecha- 

 nisms, property of contrac- 

 tion, 6, 43; voluntary and 

 involuntary muscles, 6, 45- 

 49; nature of muscular ac- 

 tion, 6, 49-52; applications 

 of muscular energy, 6, 52- 

 54; artificial aids to, 6, 54 

 seq.; man learns to use mus- 

 cular system of animals, 6, 



59- 



Museum, The British, Chapter 

 I, 6, 3. 



Mushet, Robert, his improve- 

 ment of Bessemer's process 

 of making steel, 6, 293. 



Musschenbroek, Pieter van, in- 



[ 200] 



ventor of the Leyden jar, 2, 

 280, 282. 



Mutjmaan, Professor W., Ger- 

 man experimenter in the com- 

 mercial extraction of nitro- 

 gen from the air, 6, 306. 



Muybridge, Edward, his inter- 

 est in the development of 

 chrono-photography, 8, 250. 



NABONIDUS, ruler of Babylon, 

 his deeds recorded on a cylin- 

 der now in the British Mu- 

 seum, 8, 105. 



Nadar, invented the Giant, one 

 of the most remarkable bal- 

 loons ever constructed, 7, 



253- 



Nansen, Fridtjof, his polar ex- 

 pedition referred to, 7, 48. 



Napier, cylinder press of, 8, 124. 



Naples, The Marine Biological 

 Laboratory at, Chapter V, 5, 

 113-143. 



Napoleon, contrasted with 

 James Watt as a factor in 

 the progress of civilization, 

 6, 18; used a system of tele- 

 graphic signals during his 

 Russian campaign, 8, 3. 



Natural History to the Time of 

 Linnaeus, Chapter XV, 2, 

 297. 



Natural Knowledge, The Royal 

 Society of London for Im- 

 proving, Chapter II, 5, 14. 



Natural versus supernatural, 6, 



233- 



Nautical Almanac, The, 7, 37. 



Nautilus, the, first submarine 

 boat built by Fulton, 7, 99. 



Navigating the Air (see also 

 Aeroplane), Chapter IX, 7, 

 226; Leonardo's sketches of 

 flying-machines, 7, 227; the 

 flying-machine of Besnier, 7, 

 228; the flight of the Mar- 

 quis de Bacqueville, 7, 229; 

 Cavendish's discovery of hy- 

 drogen gas and its effect upon 

 aeronautics, 7, 230; the ex- 

 periments of Dr. Black and 

 Dr. Priestly, 7, 230; the toy 

 balloons of Cavallo, 7, 230; 



