Easy electrical experiments and how to make them; (1918)
Dickinson, Leonard Perley, 1874- [from old catalog] · Chicago, F. J. Drake & co · leaf 110
N … Fic. I intimate knowledge of this useful piece of apparatus, which willbe gained through constructing it. Take a piece of pine board 2>Va inches wide, 5 inches long andy2 inch thick. Cut away one end so that it has the shape shownin Fig. 1. The necessary dimensions are there given. Upon…
Electric apparatus and appliances · Electricity
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