Powder Tester Or Eprouvette



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Powder Tester Or Eprouvette

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Powder Tester Or Eprouvette
circa 1740-1760

Content Description: 

A small and plain brass-barreled powder tester with a simple bag-shaped hand grip in dark walnut. There is no mechanical means of ignition; firing is by a powder train and match. The barrel, frame, and fork which supports the wheel are cast integrally from brass. The short barrel is bored out to approximately calibre .22 and is fitted on its top with a small round priming cup. Beneath the barrel is a steel spring which holds the wheel under considerable friction; it is the friction pressure of this spring which the explosion of the powder charge must overcome in order to partially revolve the wheel and thus register the relative strength of the powder charge being tested. The wheel is engraved with arabic numerals one through seven and a small highly stylized spray of foliage. There are no other maker's or proof marks.

Physical Description: 

Iron/steel; brass; wood: walnut. Overall length - 6 7/8"; Barrel length - 1 1/2"; Wheel diameter - 1 3/8"
1 Old Sturbridge Village Road,Massachusetts,Sturbridge,01566
Collection of Old Sturbridge Village