in tow Parts E.H.H. Gibbins creator Lonodn Blackie 1944 part-II Transformers (Page-4), General Details (Page-12),D.C Machine (Page-20), A.C Machine(Page-46). E.H.H. Gibbins E.H.H.Gibbin Electrical Drawing 604.2,GIB 20221013190243.0