This unusual weapon was designed by Isaiah Jennings of New York in 1821. Unlike most rifles of the time, the user didn't have to reload after each shot:
The multi-shot rifle illustrated takes twelve individual, superposed loads of powder and ball, one on top of each other, and is fitted with twelve individual touchholes, each with a swivel cover which also act to position and align the lock as it slides from its forward position towards the rear to align the shots in reverse order.
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