INDEX 819 



PAGE 



Transformers, efficiency . : ...... 384 



frequency 275 



fundamental principles 373 



grounding of neutra, . .392, 393, 396, 398, 399, 401, 404, 408, 413, 420 



grounding of secondaries 393 



grouping 489, 492 



impedance 426 



induced E.M.F 375 



magnetizing current 376 



mechanical design 429 



method of cooling 379 



number and size 390 



oil 443, 456 



oil drying 449 



oil testing 451 



operation 452 



parallel operation 421 



rating .- 383 



ratio 375 



reactance 377, 469 



regulation, voltage 378 



shell-type 379, 437 



shipping 445 



single and polyphase 381 



tanks .- , , , . . 429 



taps 387, 441 



temperature measurements 383 



temperature rise 383, 453, 455 



voltage 385 



voltage regulation 378 



windings 438 



Transmission, developments 4, 10 



principal data of systems 783 



reactance : 469 



voltage 8, 271 



Transportation of apparatus 193 



Traveling waves 596 



Tunnels 113 



Turbines 202 



arrangement in power-house 175 



bearings 241, 330 



brakes 348 



buckets 242 



casings 237 



characteristic curves 214 



corrosion 233 



draft tubes. ., .239 



