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 36
nd a small hole is drilled at one side toreceive a small piece of copper wire, E. Thewood screw, C, nearly touches E and is con-nected to one binding-post of the inductioncoil. The other binding-post is connectedwith the wood screw, D, which conductsthe current into the cannon, and also holdsthe… … Electrical Attachment for Discharging Toy Cannon than the ordinary cannon which is firedby means of a fuse.—Contributed by HenryPeck, Big Rapids, Mich. EXPERIMENT WITH TWO=FOOTRULE AND HAMMER An example of unstable equilibrium isshown in the accompanying sketch. Allthat is needed is a two-foot…
Handicraft · Amusements
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