SMDTEMBtR 2 1899. ANCIENT EGYPTIAN VERSUS MODERN PIN LOCKS. EGYPTIAN LOCK AND KEY SHOWING BOLT LOCKED. EGYPTIAN LOCK SHOWING PINS FREEING BOLT. The same principle is carried out in what is called The Current Supplement. YALE LOCK WITH KEY PARTLY INSERTED. KEY FULLY INSERTED RAISING PINS TO UNLOCKED POSITION. Contents. DOOR JAM Y VIEW OF ORNAMENTED EGYPTIAN PIN LOCK—FROM DAMASCUS. 155 Wood flour In dynamite., scientific american, 1899-09-02
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