Handicraft for handy boys; : practical plans for work and play with many ideas for earning money, (1911)
Hall, A. Neely (Albert Neely), b. 1883, Hall, Norman P., ill · Boston, : Lothrop, Lee & Shepard · leaf 358
s to the ground. This is caused by a change inthe center of the air pressure, immediately the card startsto move forward, from the center of balance to a pointbetween that and the forward end. This tendency toupset is neutralized by counterbalancing, or by addingstability planes in such positions… … circular piece of cardboard, using a compass or the rimof a small plate for the purpose; cut a couple of wedge-shaped pieces of equal sizeout of the edge, leavingthe piece between for atail; and turn over about^ inch of the edge directlyopposite the tail, as shown,and stick a piece cut inthe shape…
Woodwork · Toys · Amusements
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