Eprouvette

(a-proo-věť'.) [ From Fr. éprouver.] (Gun.) An instrument for testing the strength of gunpowder, or comparing the explosive force of different kinds of the same. It consists of a small gun set in a framework, and thus capable of swinging on an horizontal axis. When this gun is fired, the recoil displaces the frame, and the arc through which it pa es determines the strength of the powder. [s. 336]