An elementary book on electricity and magnetism and their applications . Fig. 140. — Slotted armature core, drum type. Partly wound. 144. Field magnets. The magnetic field in which the arma-ture revolves is ordinarily produced by a great frame of this electromagnet (Figs. 141 and 142) is so ar-ranged that it can hold the windings required to set up the linesof force; and in order that the lines may be caused to pass. <^*L¥=ii

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmagnetism, bookyear19