/.Y/V..V TO VOLUME 111. 



455 



TKLKPIIDX1C TRANSMISSION. 



gen's experiments, 170 ; trim 

 mittetl to great distances, 170. 



Telephonic transmission, Jacob's, F., 

 suggested plan for, 328. 



Telephony, Bramwell, Sir F., lecture 

 by, on, 391 ; branch of telegraphy, 

 391. 



Telfonl. definition of civil engineer- 

 ing of, suggested by Tredgold, 319 ; 

 medal awarded to Siemens, C. W., 

 106. 



Tempi-rat invs. high, electric arc 

 suitable for, 243. 



Terrenoire Co.. ferro-inanganese 

 introduced by, 142 ; Siemens 

 process used at, 226. 



Testing board, accuracy and skill 

 required in manufacture (if, 3.~>. 



Testing electric cables, 2!) : (n 

 lmnr<l xhi]>. 4."> ; method, former, of) 

 43 ; in pay ing out, 4. "> : Smith's. W.. 

 proposed method of, 45 ; in tanks, 

 45) ; differential method, 37 ; 

 (dixcha lye iiirthod, 38; battery 

 power, independent of, 38 ; de- 

 scription of, 38 ; inapplicable to 

 submarine cables, 39 ; time for 

 electrometer observations neces- 

 sary, 38) ; (/<>/ fault*, both ends 

 accessible, 4G ; copper wire sepa- 

 rated; insulated covering intact, 

 47 ; after being laid. 40 ; partly 

 insulated and ruptured, 47 : rup- 

 tured, 47 ; single, which may be 

 spoken through, 46) ; (Juintx <>/', 

 Clark's, L.. arrangement with 

 condenser, 43 ; old method, 43 ; 

 Wheatstone bridge and galvano- 

 meter method, 44 ; description, 

 illustration and rationale of, 44 ; 

 Whitehouse method, 43) ; laws, 

 general, of, 30 ; modus operandi, 

 29 ; principles involved, 29 ; sine 

 method for high resistances, 3(5 ; 

 system of, necessary, 48. 



Testing materials, importance of. to 

 students, 278. 



TIDE. 



Thermo-battery, Armstrong, Sir W.. 

 on, reference to, .'{'.ill ; gas, illus- 

 tration of, 392 ; loss of energy in, 

 393 ; modus operand! of, :UL' ; 

 Siebeck's, discovery of in 1822, 

 :5'.2 ; tension, low, of, 393 ; thermo- 

 dynamics, second law of, depen- 

 dent on, 393. 



TlR-nnodynaiiiics, sec )iicl law of, 

 341. 



Theoretical consumption of fuel in 

 steam engines, 9.1. 



Thomas's lime lining, reference to, 

 226. 



Thomson's, J., turbine wheels, 

 196. 



Thomson, Sir W., compass of, 346 ; 

 conservation of sun's energy, 

 hypothesis of. 29(5 ; currentsof high 

 electro motive force, suggestions to 

 IIM>. 406 ; energy, researches on, 

 reference to, 325 ; galvanometer 

 of, sensitiveness of, 37 ; heat and 

 mechanical energy, relation be- 

 tween, reference to, 184 ; on 

 measurement, 114, 115: mirror 

 instrument of, 175 ; molecular 

 theory of gases, reference to, 299 ; 

 sounding line of, 123 ; syphon 

 recorder of, 175, 326 ; systems, 

 static and dynamic, relation be- 

 tween, 324 ; tide gauge and 

 recorder of. 340 ; transmission of 

 power, practical law regarding, 

 ! 406. 



Tidal wave, difficult to utilize. 188 ; 

 energy, source of, 188 ; (iitilhu- 

 timt of, by basins and vortex or 

 turbine wheels, such as Thom- 

 son's, J., 195 ; calculation of rise 

 of tide available, 195 ; calculation 

 of horse power producible per 

 acre, 195 ; practical difficulty and 

 expenditure, enormous tidal basins 

 required, 93). 



Tide gauge and recorder. Thomson's, 

 Sir W., 346. 



