458 



INDEX TO VOLUME III. 



WHITWORTH, SIR J. 

 lie compressed, 61, 144, 226; tool, 

 made from crucible steel, 227. 



Whitworth, Sir J., linear measures 

 lecture on, by, 117 ; measure- 

 ment a bout, of, 117 ; metre, uon- 

 adoption of by, impediment to 

 unification of linear measurement 

 through the world, 117; plane, 

 absolute, introduced by, 117; 

 Siemens process used by, 226 ; 

 steel, definition of, reference to, 

 147. 



Wiedemann's four ways of determin- 

 ing Ohm, reference to, 325. 



Wilde, dynamo - electric principle, 

 application of, 178 ; magneto 

 machine developed by, 396. 



Williams, M., on gaseous atmosphere, 

 reference to, 299. 



Wind - power. 93, 204 ; (applica- 

 tion of, inconvenient and uncer- 

 tain, 1)3 ; by means of windmills, 

 sailing ships, &c., 93). 



Wire gauge, Birmingham, 417 ; 

 (Board of Trade, 417, 420 ; cal- 

 culation necessary before use in 

 specifications, 419 ; dimensions of, 

 illustration of increase of, 418 ; 

 system, want of, in, 418 ; unsuit- 

 able to engineers and scientists, 

 419) ; Whitworth. 417. 



Woolwich Arsenal regenerative gas 

 furnace, not designed or erected 

 by Siemens, C. W., 158. 



ZOELLNER. 



Woolf's double cylinder engine, 191. 



Wootz, production of, 138, 140. 



Work, 89 ; mechanical, method re- 

 quisite in, 362 ; unit of, 89 ; waste 

 in producing, 362. 



Workhouse a final abomination, 265. 



Workmen's benefit societies, 264 ; 

 use of, 265. 



Workmen's and employer's interests 

 identical, 389. 



Workshops, business of trade acquired 

 in, 386. 



Wrought iron, 149. 



YATES, mechanical puddling, refer- 

 ence to, 149. 



Yolland, Col., Steel Committee, 

 member of, 145, 



Youth's " desire " acquired in old 

 age, 290. 



ZAUKEHODE, electric propulsion at, 

 40!). 



Zinc and coal, cost of, 392 ; energy 

 of, 392. 



Zodiacal light, Mairan's explanation 

 of, possible, 308 ; further con- 

 sidered, 308. 



Zoellner on gaseous atmosphere in 

 space, reference to, 299. 



THE END. 



BRADBCRV, 



f, & CO., PRINTERS, \VHITEFRIAR<3. 



