Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 585
iece of in-sulated copper wire, size 18 to 24, and twistfirmly into contact with the metal, first, of course,scraping the ends of the wires free of their cov-ering. Secure an ordinary mason jar, pint size, and 943 944 APPLIED SCIENCE AND MECHANICS FOR BOYS [Aug., fill it with water to within one… … they will not touch. Another good way is to cuta strip of wood from a cigar-box and make thearrangement shown in Fig. i. Fig. 2 shows thecomplete battery. Experiment No. 23 Put the free ends of the wires into your mouth,one under and one over the tongue. You willexperience a sour, vinegar taste.…
Children's literature
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