Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 578
ent, by its vastly greater E.M.F., or power toovercome resistances. A coil constructed for Mr. Spottis-woode of London has two hundred and eighty miles of wirein its secondary coil. With five Grove cells this coil gives asecondary spark forty-two inches long, and perforates glassthree inches thick.… … Fig. 447. DYNAMO DEFINED. 557 ondary coil within from one-fourth of an inch to one inch of each other,according to the capacity of theinstrument. A series of sparksin rapid succession pass from poleto pole. Experiment 9. — Introduce aGeissler tube. A, into the secon-dary circuit. These tubes…
Physics
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