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If you are fond of inspecting curious fire-arms, you should examine the depot d'armes of M. BOUTET in the Rue de la Loi, whose manufactory is at Versailles, and also pay a visit to M. REGNIER, at the Depot Central de l'Artillerie, Rue de l'Universite, who is a very ingenious mechanic, and will shew you several curious articles of his own invention, such as a dynamometre, by means of which you can ascertain and compare the relative strength of men, as well as that of horses and draught-cattle, and also judge of the resistance of machines, and estimate the moving power you wish to apply to them; a potamometre, by which you can tell the force of running streams, and measure the currents of rivers.
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