St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 15
Fig. 6. … Fig- 7- ABOUT KRICTIONAL ELECTRICITY. 13 site elecftricities uuite with sparks across D and E. Ifuse is to be made of the eledlricity, either the rubber orthe prime condutffor must be connected with the ground.In the former case positive eledtricity is obtained; in thelatter, negative. 10. The…
Electricity
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