taken offto be polished, and the appearance will be more workman-like. This click should have its point hardened and tem-pered, as there is considerable wear on it. If the great wheel has spokes the best form for the twosprings for keeping the train going whilst being woundis that of the letter U,… … Fig. 87 soft, then hardened and tempered to a full blue. They arebest when as large as the space between two arms of themain wheel will allow. When screwed on the large ratchetthe backs of both should bear exactly against the respectivearms of the mainwheel, and a pair of pins is put in theratchet,…
Clocks and watches
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