another cuts the edges, so that they may fit in a circle; a fourth turns the head; a fifth receives the staves, which are placed by the attendant on end in the form of a barrel, within the grip of a hydraulic press, claps a hoop on the top and bottom, and with one squeeze completes the operation. By such appliances a piece of solid oak plank is converted within five minutes into a finished barrel. The total produce of carefully-prepared powder-cases during the financial year 1856 was 25,331, and of boxes for ammunition, shell, &c., no less than 287,171. How many barrels can be made at a pinch we do not know, for the machinery is only just put up, but the number must be enormous, and when the visitor witnesses the nimble fingers of machinery galloping over the work, he wonders how the business was ever got through in the old time of the chisel, gouge, hammer, and plane. In the shops devoted to the manufacture of the gun-carriages and trucks for the land and sea service, skilled artisans are employed, except in the wheel department. The vast strength requisite to support and withstand the recoil of 56, 64, and 98-pounders, necessitates the most solid construction and the best workmanship. Some of these platforms for traversing cannon, made of teak, and bolted and finished at the ends with bright copper bands, look like handsome pieces of furniture rather than ship's gun-carriages. Compared with these ponderous articles, the light constructions fitted for the field-artillery seem like children's playthings. Here they may be met with in every variety and in every stage of progress, so substantially put together that the marvel is that they ever wear out. The sort of succession of earthquakes, however, to which they are subjected in a campaign tells even upon those solid joints, and but few of the gun-carriages employed in the Crimea, although new when they went out, returned fit for further service.