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Old Eprouvette Pendulum

Old Eprouvette Pendulum.jpg Powder MillThumbnailsHand or Arrow RocketPowder MillThumbnailsHand or Arrow Rocket

The only real use of these eprouvettes is to check and verify the uniformity of a current manufacture of powder, where a certain course of operations is intended to be regularly pursued, and where the strength, tested by means of any instrument, should therefore be uniform.