Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 37
I i / , f -Z :li > . .-..Trrj . 151 ^ M&griptje\A¥ii .^^ s • ifg? / / / : \ \ \^ \, ^^., ^--^- y y / I \ \ \ \ Fig. 27.—Bar Magnet. ings to the paper. Paraffin paper can be prepared by dippingunglazed paper into a tray of melted paraffin. See Fig. 24.If the field is produced on sensitized… … Fig. 28.—Two Parallel Bar Magnets, Unlike Poles Adjacent. porarily at least, study each one in detail as it is made, andreproduce the same b}^ a sketch at the time it is being made. MAGNETIC FIELDS. 19
Electricity · Magnetism
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