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 1249
-^ R GOO rh= … Fig. 546 The brushes may be improperly set. The brushes may notmake sufficient contact with the commutator. The com-mutator may be rough or worn. The fields may be ofuneven strength. 881. How can a wrong connection of the coils be testedfor? Ans, In order to see how this test can be made let…
