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The notches being cut by this direction, the irregularity, which muſt appear in their diſpoſition, when the levers reſume their ſtation in the frame B; and, the inequality of the receſſes, expreſſed on the bit of the key; will be as a ſeal, and its impreſſion to each other.
Having endeavoured (and I hope with effect) to give a juſt conception of the Principle, and to prove, that inviolable, ſecurity infallibly reſults from the moſt ſimple application of it; I ſhall proceed to give an example of its effect, in a Lock more curiouſly conſtructed, and, in which it is more extenſively applied.
The firſt figure of the ſecond plate, repreſents a circular block of metal, divided from its center into eight compartments; each compartment containing a cell, which forms a paſſage through the block, as repreſented by the ſmall circles, deſcribed on the flat ſurface A.—In each of theſe cells,
