Amateur mechanics ... a book for old and young who like to make things .. (1907)
Popular mechanics magazine, Chicago. [from old catalog] · Chicago, Popular mechanics · leaf 94
sides(Fig. 2). The upper screw is to connectthe battery wire, the lower one to raise POPULAR MECHANICS and lower the zinc. The battery is nowcomplete,-and the solution (Fig. l) must beprepared. Proceed as follows: In 32 oz. of water dissolve 4 oz. potas-sium bichromate. When the bichromatehas all… … Details of Home- Made Battery stantly, 4 oz. sulphuric acid. Do not addthe acid too quickly or the heat generatedmay breaii the vessel containing the solu-tion. Then pour the solution into the bat-tery jar, until it is within 3 in. of the top.Thread the wire holding the zinc throughthe porcelain…
Handicraft · Amusements
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