[Bubier], Edward Trevert, 1858- [from old catalog] · Lynn, Mass., Bubier pub. co. · leaf 187
a wooden cylinder the same size as theoutside of the winding you have just completedand use this as a form on which to make the iron RECENT APPLICATIONS. 185 sheath. Take a strip 2§ inches wide of soft sheetiron, such as is used in making stove pipes, and wrapthis tightly around the form until its… … Iron Figure 2. keep it from untwisting like a watch spring. Slipthis sheath over the coil and up tight against thedisc and wedge it there by small pieces of paper.Make the armature of a piece of iron about ^\ ofan inch thick and cut it in the form shown inFig. 3, the larger circle having the same…
Electricity
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