Handy man's workshop and laboratory . Fig. 174—Details of theelastic pendulum Fig. 176—When weight is deflected andraised—ratio % HANDY MANS WORKSHOP AND LABORATORY I99 at the top and a plug of lead at the bottom. The weight may beadded to by putting shot in the tube. A record of the curvetraced by the moving weight is obtained by attaching a pealamp to the lower end of the weight; supplying this with currentfrom two very light wires coming in from one side, and photo-graphing this light by a camera placed vertical to the plane inwhich the pendulum swings. A lamp may be selected giving. Fig. 1
Handy man's workshop and laboratory . Fig. 174—Details of theelastic pendulum Fig. 176—When weight is deflected andraised—ratio % HANDY MANS WORKSHOP AND LABORATORY I99 at the top and a plug of lead at the bottom. The weight may beadded to by putting shot in the tube. A record of the curvetraced by the moving weight is obtained by attaching a pealamp to the lower end of the weight; supplying this with currentfrom two very light wires coming in from one side, and photo-graphing this light by a camera placed vertical to the plane inwhich the pendulum swings. A lamp may be selected giving. Fig. 177—When deflected and depressed—ratio ^ practically a point source, and the small wires do not sensiblyaffect the motion of the pendulum. First case: When the ratio is 1/1. It was not/found possibleto exactly produce this ratio with springs of brass or steel; thevertical vibration being too fast when the whole suspension wasspring. The best that could be done was a ratio of about 87 to100, which is, however, near enough to enable us to see what thecurve would be, were the exact ratio 1 to 1 obtainable.
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Keywords: ., book, bookcentury1900, bookdecade1910, booksubjectworkshoprecipes
