Fritts, Charles Edgar. [from old catalog] · Philadelphia, The Keystone · leaf 35
fied in the fol-lowing description, to make it simpler and shorter. Put a slipof paper under the balance, to keep all the parts still duringtreatment. The watch (in the case) is tested as a whole, bylaying it on the bench near the needle, to find the strongestmagnetic points and their polarity.… … Fig. I. wooden block will do,) and hold the watch near it, with thestrongest North point (at the figure XI) before the North poleof the magnet, i.e., so that they repel. The line X, X\ shouldpass through the center of the watch and also through the axisof the magnet. Taking it in both* hands,…
Clocks and watches
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