Easy electrical experiments and how to make them; (1918)
Dickinson, Leonard Perley, 1874- [from old catalog] · Chicago, F. J. Drake & co · leaf 159
e two bearings are not alike,for one of them must be made so as to serve as a supportfor brushes, while the other one is a plain simple bearing. The former is shown in plan in Fig. I, and in elevationIn Fig. 2. Measure the height of the center of the circular armaturespace above the top of the… … i^C
Electric apparatus and appliances · Electricity
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