To those curious in the progress of invention as it relates to gunnery, it would be highly interesting to visit the “Musée d’Artillerie” of Paris, and there to study the classified selections in the possession of the French Government. Among other specimens equally interesting, he will find revolving pistols, revolving rifles, and swords and revolving pistols combined in one; and these produced in the early part of the seventeenth century. The revolving pistol did not therefore originate with the present generation; and however universally we may use the “Colt,” “Adams,” or “Tranter,” neither can lay the slightest claim to originality. In that museum will be found four, five, and six charge chambers; and though in all there is certainly an absence of movement in the chamber, produced by the cocking of the lock, yet several present the appearance of having formerly had some mechanical adjunct for revolving the chamber: this, though well adapted to the present percussion system, must certainly have been troublesome to manage in the old flint lock; for when the first barrel was discharged, the priming of the other barrels would be lost during the revolution of the chamber. A great improvement was, however, soon introduced; a hammer and pan were attached to each division of the chamber, and each being already primed, presented itself in rotation in the face of the flint. The gun or pistol was by these protuberances rendered clumsy and cumbersome, and thus fell, no doubt, into disuse; but every real mechanic must see on investigating the subject, that the principle was as perfect as that which is now in use. Mr. Colt had considerable difficulty in securing a patent for his revolver. The right of patent hinged on this simple question: did he, or did he not, first introduce a crank or lever for revolving the chambers during the cocking of the lock? After an expensive trial it was decided that he _did_ introduce it; though doubts are still entertained whether there is not now extant a pistol having the same crank movement as that found in the “Colt” and other revolvers. At all events the invention of revolving pistols originated with our progenitors, more than 200 years ago, though their re-introduction is unquestionably due to Mr. Colt; and the “old broth warmed up” has no doubt proved more nutritious than the original concoction. In the Paris museum, a number of breech-loading guns are to be seen; I think more than sixty varieties. Many of them are highly ingenious, displaying great mechanical knowledge and working skill, and the whole, kept in splendid order, cannot fail to command attention.