al cuts,which will permit the surrounding air to act equally and atthe same time on the steel rod, S, the aluminum tube. A, andthe steel tube, R, and as the steel tube, R, is open at itslower end, and as there is also a certain amount of space be-tween the tubes, the steel rod, and the radial… … Fig. 10. Fig. U. Fig. 12. THE MODERN CLOCK. 5I The lenticular pendulum bob has a diameter of 24 cm.,and is made of red brass. The bob is supported at its cen-ter by the regulating nut, O, Figs. 10 and 12. That thebob may not turn on the cylindrical pendulum rod, the latteris provided with a…
Clocks and watches
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