Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 350
K Jour. Frank. Inst., Vol. CXXXIII. April, 1892. {AUrkh. Sh.-et //.) … 326 Electrical Section, [ J. F. I., through air or iron: and, if through iron, upon how it isdisposed, whether in the simple iron-clad construction ofan external shell, or in addition to this an internal shell, asin the Ayrton and Perry^ tubular iron-clad electro-magnet. Balance of the…
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