Meadowcroft, Wm. H. (William Henry), 1853- · New York : The American Technical Book Co · leaf 40
ive conductor from adynamo or sufficiently power-ful battery will attract toitself iron filings if broughtinto contact with them. With a small compass or delicate horizontalgalvanometer the presence and direction of thelines of force around an active conductor can betraced. To perform this… … 3* The A B C of the X Rays,
X-rays
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