Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 37
ied,heating the paraffin, which upon cooling fixes the iron fil- \ \ f / / / / S ^ .h ^ Jhsn^tie^jixk ^ S- riVr 4 \ -1 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 by a sketch at the time it is being made. MAGNETIC FIELDS. 19
Electricity · Magnetism
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