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New Pattern Eprouvette

New Pattern Eprouvette.jpg OnagerThumbnailsHooped Cannon in wooden bedOnagerThumbnailsHooped Cannon in wooden bedOnagerThumbnailsHooped Cannon in wooden bed

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.