Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 317
cted to the supply circuit. Therotating element has a large number of slots, partially closedat the top, containing copper rods or bars which are slippedin endwise. These bars are securely bolted at each end toa substantial metal ring. It is all so exceedingly simplethat one must appeal to…
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