Electricians' operating and testing manual; (1910)
Horstmann, Henry C. [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] joint author · Chicago, F. H. Drake & co · leaf 54
d Testing sistance into the circuit and thus weaken the fields ofthe dynamo. By moving the bar in the proper direction we cantherefore increase or decrease the current strength inthe fields a-nd thus change the number of lines of forcein the armature and these in turn (speed of armatureremaining…
Electrical engineering · Electric testing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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