Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 27
gth of the string of Electricity. [Book I. brads drawn after the pole depends on the strength of the inducing pole. The same ex-planation applies to the brush-like appearance of the filamentsof iron filings round the polesof a magnet, each filing beinga magnet and inducing mag-netism in the one… … 7. Steel under Induction.—If, instead of a piece of softiron we take a piece of unannealed iron, or better, a pieceof tempered steel, we notice a remarkable difference in itssusceptibility to magnetic induction. Choose, for example, apiece of soft iron wire, and a knitting-needle of about thesame…
Electricity
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
