Easy electrical experiments and how to make them; (1918)
Dickinson, Leonard Perley, 1874- [from old catalog] · Chicago, F. J. Drake & co · leaf 202
Fig. 6. … wooden rings used should be thoroughly dried in an ovenand then well soaked in boiling hot paraffin wax before beingused: The two terminals of the finished secondary may bebrought out at the ends, one through a small hole in D, theother being left sticking straight upward. Now select a pieceof…
Electric apparatus and appliances · Electricity
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
