/.Y/>/-:.V TO VOLUME //. 



491 



i i.-i-. 



tliienee IP!' den-it\ mi. :Hi" ; water, 

 depth of, Imw inline-need by. tren - 



r:i! -tat.-liinit. 360. 



of bathometer, 363, 364, :i7". 

 374. 383 ; of high pressure vessels, 

 190,891, 



Theory of exchanges, Prevost's, re- 

 ference to, 411. 



Thomson, Sir William, deep sea 

 sounding apparatus and batho- 

 meter compared, 377 ; deep sea 

 sounding by pianoforte wire, dis- 

 cussion of paper by, 333 3:i.~> : 

 (*//'.< i-ituxn-rntion, convection cur- 

 rents, theory of, 424 ; meteorite. 

 theory of, 424) ; sun's temperature 

 :<.(><>'. 4:r., 44<. 



Trains, signalling of. from station to 

 Nation, 304 ; two should never 

 occupy same section of line to- 

 gether. 304. 



Transmission of electricity for light- 

 ing, 388 ; horse power used ami 

 converted in. 388. 



Transmission, hydraulic, economical. 

 386. 



Transmission of power to distances, 

 386. 



Transverse strain, illustration of 

 how affected, 315. 



Tweddell's, suggestion of, leather 

 or hemp joints for high pressure. 

 objections to, 393. 



Tyres, cast steel, Krupp's manufac- 

 ture of, 303 ; of homogeneous steel 

 instead of welded iron, 307. 



UNDERGROUND locomotives, heated 



bricks for, 357. 

 Units of length and mass, relations 



of, 306. 

 Unwin, Prof., reference to expan-i n 



of air, 353. 



VELOCITY of shot, Siemens'?, \\\-\-., 

 method of determination of, 300. 



WAT Kit MI;I u:. 



Ventilation and working of railway 

 tunnels. 3.V5. 



Ve el- t.i resist high pressure. 

 Siemens'-. I'. W., 3V.I. 



Vicaire on sun's temperature, 1,3118 

 C., 435. 



Vienna Patent Congress, chairman 

 of, Siemens, C. W.,341 ; England's 

 representative at, Webster, 341 ; 

 originated by Baron Schwartz Sea- 

 born, 311. 



Vortices and explosions on sun's 

 surface. 431. 



\\ASTK of water, 275,294. 



Water, depth of, affects terrestrial 

 attraction, 360. 



Water levels in wells, heat due to 

 difference of, 3H:>. 



Water meter, Abraham's impact, 

 failure of, cause of, 280 ; Adam- 

 son's, 278 ; applicability, gene- 

 ral, of, 275 ; (by area i'f 

 channel, 276 ; use of, 278) ; Bar- 

 ker's mill or turbine of spiral 

 blades applicable, 280 ; Barr and 

 Macnal's, 278 ; Bryan, Donkin 

 and Co.'s, 278 ; bucket or cistern, 

 276 ; Chadwick and Hanson's, 

 278 ; cheap and compact, should 

 be, 276 ; Chrimes's, 278 ; cistern 

 or bucket, 276 ; cistern, incon- 

 venience of, 277 ; conditions of, 



275 ; continuously, should work, 



276 ; difficulties in production of, 

 viz. pressure variation, chemical 

 action of water on working parts, 

 lightness and strength with cheap- 

 ness and compactness, 290 ; Erics- 

 son's, 278 ; Guest and Chrimes 

 makers of Siemens's, C. W., 281, 

 286 ; (by impact, 276 ; conditions, 

 essential, of, 279, 2SO ; difficulties 

 of, 281 ; failure of, with screw 

 propeller of irregular form, 280 ; 

 Siemeus's, C. W., description of, 



