1823 London Magazine article about percussion lock
This is a quote from the London Magazine, by John Scott, John Taylor about the New Percussion lock.
"New Percussion Lock
Mr Forrest, gun-maker, in Jedurgh, has lately contrived a percussion lock, which with a double barrelled shorgun will answer for eighty discharges, with scarcely and further trouble than merely filling the magazine before setting out. by the intervention of a cyclinder bewtixt the pan and the magazine, on turning which a pan is filled, all communication with the gunpowder is cut off; for whatever position the cycinder is placed, the priming in the magazine is never brought in contact with the powder; all possibility of accident is thus prevented; that with the greatest carelessness there is no danger. The priming is the same as that is used with Forsythes lock, three parts of superoxymuriate of potash,one of flowers of sulpher, and one of charcoal."
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