Powder-Tester (c. 1800)
1800
Powder-Tester (c. 1820)
1820
Powder-Tester (c. 1700). Powerful steel spring attached to an arc along which is a brass wire
1700
Powder-Tester (c. 1730)
1730
Powder-Tester (c. 1740)
1740
Gunpowder testing device
1701-1800