>An eprouvette is a one piece, fixed elevation mortar used by ordnance departments and armories to test the strength of gunpowder. >A carefully weighed quantity of powder (charge) was placed inside the device, followed by a standard weight shot. The charge was fired and the distance the shot flew was measured and compared to the expected standard distance. [https://lemmy.world/pictrs/image/0a4a4a81-9265-44e9-acbb-6f0caf9693e9.jpeg] [https://lemmy.world/pictrs/image/4f406a5b-9372-482f-aa3c-64d7bc749c4b.jpeg] [https://lemmy.world/pictrs/image/b41aff0b-b452-40ad-b58f-636356a40be7.jpeg]