Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 68
ow strip of paper (Fig. 101) and focusthe sunlight on the head. Does the match light? Experiment No. 59. A magic cannon. Stick a needle intothe under side of a cork and stick a match on the other end of the needle (Fig. 102),with a small piece ofpaper at one side of thehead. Insert the stopperin an… … 66 GILBERT BOY ENGINEERING ■ The lighted matchheats the air and theexpanding air drivesout the cork. Experiment No. 60.Focal length of con-cave mirror. Focusthe sunlight on a nar-row piece of paperand measure the dis-tance between theback of the mirror and the paper. This is the focal length ofthe…
Light · Scientific recreations
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