424 



INDEX TO VOLUME III. 



APPRENTICESHIP. 



which might be included in, 

 152. 



Apprenticeship, necessity for short, 

 281. 



Arago, reference to, 216. 



Archimedes, mechanical contrivances 

 of, 116 ; principle of teaching of, 

 319. 



Arcs, electric, large and small, lumi- 

 nous rays in, comparison of, 333. 



Aristotle on natural forces, 183 ; 

 steel described as purified iron by, 

 138. 



Arkwright,cotton spinning developed 

 by, 231. 



Armature of Alteneck von H., 399 ; 

 of Pacinotti, 399 ; of Siemens's, 

 Wer., 395. 



Armour plating and projectiles, 59. 



Armstrong, Sir William, electrical 

 current, application of, by, 223 ; 

 gun of, 59 ; power, transmission of 

 by, 407 ; thermo-electric battery, 

 reference to, by, 393. 



Arsenal, Siemens's furnace and pro- 

 cess used at without acknowledg- 

 ment, 292. 



Astronomical Society, celestial bodies 

 studied by, 65. 



Astronomy,researches in, by Huggins, 

 W., Liveing and Lockyer, J.N.,with 

 aid of dynamo-electricity, 258. 



Atlantic cable, second, criticism of, 

 8, 21 ; success desired in interests 

 of progress, science and investors, 

 8. 



Atlantic propeller vessel, 345. 



Attwood,C., regenerative gas-furnace, 

 one of the first licensees of. 140. 



Aurora Borealis, De la Eue, W., on 

 greatest brilliancy of, 355 ; imita- 

 tion of in vacuum tube, by, 355. 



Ayrton and Perry's electric measur- 

 ing machines, 412. 



Azo-scarlets, cochineal superseded 

 by, 337. 



BELL, I. L. 



BACON, Lord, force, nature of, 183. 



Bain, telegraphic inventor, reference 

 to as, 75. 



Baker, B. and Fowler, J., engineers 

 of Forth Bridge, 350. 



Balance, Wheatstone. See Wheat- 

 stone Balance. 



Balfour, F. M., career of, 317 ; death 

 of, reference to, 317. 



Barlow, W. H., logograph of, 169 ; 

 Steel Committee, member of, 145. 



Barnaby, N., naval architecture, 

 address on, reference to, 113. 



Basic lining, difficulty with, 226 ; 

 Siemens's, C. W., experiments with 

 in ] 868, 226. 



Bathometer, Siemens's, C. W., 123 ; 

 description of. 123 ; object of, the 

 measurement of depth, 123 ; para- 

 thermal arrangement, 123 ; prin- 

 ciple of, diminution of force of 

 gravitation with depth of water. 

 123 ; tests of, 123 ; Thomson's, 

 Sir W., sounding line, comparison 

 of, with, 123 ; uses of, 124. 



Battery, explanation of action of, 

 30. 



Battery, secondary action of, Frank- 

 land, Dr., Gladstone, Dr., and 

 Tribe on, reference to, 410 ; appli- 

 cation of to boats and tramways, 

 410,411; efficiency of, 410; Faure's, 

 410; permanence of, 410; Plante's, 

 410 ; Sellon's, 410 ; Siemens's, 

 C. W., 410 ; Volckmar's, 410. 



Bedrooms, time wasted in, 360. 



Bell, steam navigation introduced by, 

 112, 232. 



Bell, G., photophone of, 267 ; (tele- 

 phone of, 169 ; currents of rapidity 

 and minuteness of, 170 ; develop- 

 ment of, 284 ; diaphragm, metallic 

 of, application of magneto-induc- 

 tion by, 170). 



Bell, I. L., Bessemer medal, remarks 

 on presentation of, to Siemens, C. 

 W., 107 ; blast furnace, full dis- 



