Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1295
Fig. 588interior construction of an air blast transformer … Fig. 589 SET OF COILS MADE UP READY TO BE PLACED IN TRANSFOBMEB Transformers 1267 now equivalent to 4 K. W. on a 100 K. W.) its efHciencyis 484-50=0.96.
