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The book of stars (1920)

Collins, A. Frederick (Archie Frederick), 1869- · New York, London, D. Appleton and company · leaf 101

An illustration from The book of stars, 1920, leaf 101
SEWING NEEDLE Fig. 91.—Needle for Dipping Needle.needle at any place on the Earths surface is just about that ofthe latitude of the place where it is used. Dipping needles arealso used by miners for finding iron ores. To make a dipping needle, slip a small cork over a knitting … Fig. 92.—Dipping Needle Complete.needle and push a sewing needle through the cork at right anglesto the knitting needle, as shown in Fig. 91. Now lay the sew-ing needle with its ends on the edges of two tumblers, and seethat the knitting needle is perfectly balanced. This done, mag-netize the…

Astronomy · Stars

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