At Weovil, in the south of England, are produced biscuits for the royal navy. There the motive power is a large steam-engine, whose agency is visible in all parts of the establishment. The services of this engine commence with the arrival of a cargo of wheat under the walls of the building; and we should have a very imperfect notion of the ingenuity displayed in the establishment if we did not examine some of the earlier processes. Let us, then, begin with the beginning; and having observed that the wheat is lifted by a steam-worked crane from the lighter to the uppermost floor, let us descend to the floor below, and examine the first process to which it is submitted--that of cleaning. The grain supplied from above flows in a continual stream into one end of a cylinder of fine wirework, about two feet in diameter and ten in length which revolves steadily in a horizontal position. A spiral plate runs through the interior of this cylinder, dividing it into several sections, and thus forming a sort of Archimedean screw. The revolutions of this cylinder carry the grain onward through its whole length, so that in the passage any particles of dirt that may have been mixed with it fall through the interstices of the wirework. The effectual character of this operation is exemplified by the quantities of dirt deposited from wheat which to all appearance was clean before entering the cylinder; the grain thus thoroughly cleansed, descends another stage to the grinding-room (for the wheat is ground on the premises), where ten pairs of millstones are worked by the same steam-power. There is nothing peculiar in the process of grinding; but the manner in which the flour is afterward collected deserves notice. As it flows from the several stones, it is led into horizontal troughs, along which it is propelled by the action of perpetual screws working in each trough. The contents of all the troughs are brought to one point, whence, by means of a succession of plates or buckets revolving round a wheel, on the principle of a chain-pump or dredging-machine, the flour is lifted to the story above, where it is cooled, sifted, and put into sacks, for removal to the bakehouse. It is not long since we observed in a newspaper the announcement of an invention for collecting and saving the impalpable powder, which flies off in the process of grinding corn, and which, containing the purest portions of the flour, has hitherto been wasted. This saving has not yet been effected at Weovil, as our whitened appearance on leaving the millroom sufficiently testified; but doubtless, the zeal and ingenuity that has introduced the improvements we are describing will not stop short while any thing remains to be done.