ently made in the British Medi- case, but they may be attached to a lock or case of any other immediately untilit acquires a fine dark green color; it is cal Journal, which offers a problem to mechanics. It would form. The base or back of the lock—that portion perma- then to be held over a strong… … central plate, D, and through RUPPEL’S PATENT LOCK. a@ similar aperture in the base piate, A, when a quarter turn of the movable part, Fig. 2, it acquires a fine brown color after ten to twelve repetitions the suggestion of the journal we mention is, that liquid pro- brings the head of the bolt, C,…
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