This is a thoroughly Yankee invention ; it is ingenious, simple, and easily worked. Our lady readers will no doubt examine its merits with care, and order their husbands to purchase one immediately. In our engraving, A A is a hemmed piece of tin bent into the form of a Y, the ends of which are soldered to the under side of the segment, C, the latter forming a box for the reception and delivery of the grated material. is the rasping surface soldered to C, and forming the exact arc of a circle. G, is th handle. D D are the radial guides, formed of a wire bent as seen in the figure, being hinged at the apex of the sector so as to swing frely backwards and forwards. The ends of the guides are soldered to the bottom of fto cylinder, or holder, E, in which the nutmeg or other article is placed. F is a wooden piston, or follower, for pressing, with any desirable force, the substance to be grated against the rasping surface, B. This follower, the bottom of which is shod with a rough disk of tin, is a little longer than the holder, E, in which it plays, being prevented from dropping out or touching the grater, by means of a short pin, projecting through a longitudinal slot in the holder, said pin and slot being so arranged that the piston may be entirely withdrawn from the cylinder whenever the operator wishes to insert an article to be grated. The method of holding the instrumentin the hands and operating it is sufficiently explained by the engravings. It was patented on the 13th of October, 1857, and further information may be obtained from the assignee, Edmund Brown, Lynn, Mass. * Cast iron is case hardened by first heating it to a red heat, and afterward; putting it into a copperas water.