A machint: of the above descrip tion has been lately invented by H. B. George, of Nashua, N. H., who has taken measure to se cure a patent. It consists of a pair of jaws furqished with a knife, lor cutting the heated bar of iron to a proper size. the distance for inserting the bar being Iegulated by a stop, which is attached by a pivot to the table or platform, on which the whole apparatus rests. These j'3.ws are curved, so that when the front ends are open tht: inner ones are closed, and vice

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... ersa. To operate them a crank is turn. ed, which moves hack and torth by means of a slide and toggle.joint, an action block con· nected with the ja we and also with the header. The hction block, when drawn back its full distance, allows two springs attached to the table to throw inwards the inner ends of the ja WB, nnd consc'luentl y to distend the outer ends, the bar is then inserted, aod the move ment of the cra.nk ooing reversed, the action block is forced forwards and opens the inner ends of the jaw!, and closes the outer ones. The header, which consists of a vibrating arm, is also moved forward at the same time, and forcing aside the stop forms the head of the spike by compressing the end of the iron bar against the inner eide of the jaws in a small recess. While the jaws are closing the cut ting edge of the knife, which works on a pivot on the upper surface of one of the saws, is moving outward. and coming in contact with the bar, cuts it off with a bevel. On rever sing the movement, the action blbck is drawn back, the jaws are again opened and the spike now complete, falls out from between th.'m. ------. A m achine for the purpose of superseding manllal laoor in the operation of plastering walls, has been invented by Isaac Hussey, of Harveysburgh, Ohio, who has taken measures to secure a patent. It consists of a movable frame upon rollers that can be adjust ed to suit any height, and of a smaller frame sliding within i�. The latter serves to support a mor· tar box containing the trowel, which is raised and lowered by means of a drum and �ndless chain. When In operation the trowel is sup plied with mortar by a rod and follower, which are worked by a lever, the quantity being re gulated or shut off, as required, by a slide th at covers the o pening in the box. For plaster. ing ceiling it is only requisito to raise the mor tar box to the top 01 the frame, and for side walls it is adjusted accordingly by burning it to a proper position. For this last-named operation the box is shifted by the sliding bame, which is moved bar k and f�rth for that purpose by means of the alreadY'mentioned lever. There are also vp.ri�us cords and pul. leys a ttached to the machine for facilitating the operatIOns of the different parts, which are included in the inv911tion and form a part of it. A new contrivance tor the above· mentioned purpose has been invented by Safford E. Stur-Pa., has taken measures to secure a patent for purpose has been jrlVented by George W. tevant, of Hartford , Vt., who has taken mea-an improved Coin Detector, which, from its Wight, of New York City, who has taken sures to secure a patent. It consists in aecll· portability, can likewise be used as a recepta. measures to secure a patent. It is an appara ring the shaf ts of vehicles to the axle or the de for coins and b ank bills, thus supersetus intended for the use of packers, to torce axle to the shafts, by means of an eye or colding the empI'oyment of a port-monnaie . It down the lids of boxes when they are to be lar with taper or conical ends, which fit in consists of an outer cylindrical case, contain. fastened by scre ws o. r nails. It consists ot a sockets attached to the shatts. A screw-bol t ing a likewise cylindrical gauge box, which is vertical screw working in a nut, which is is inserted longitudinally through the eye or I fitted with an aperture at one end of the proformed in a crosspiece. Attached to this lat· collar and the sockets to keep the ends firmly per size, to receive a genuine coin, so that if ter are a couple of bent a rms which swing. secured. To obviate any inconvenience trom the counterteib be larger it cannot pasll through' j freely, and to the end of the screw is fi.xed an the wearing of the eye or collar, so that tbe .For testing by weight, the outer case is made iron plate which hears on the top ot the box, ends would nob fit tight, the shanks in which to serve as a b alance, for which p urpose a or rather on a stout board that rests on the the sockets are sunk, can be broughb nearer pair of clamps that are kepb inside are I lid. It will be percei ved that, by turning the together by means of a nut on the bolt. The withdrawn, and the small points inserted in I screW, the cross-piece will commence to rise, apparatus, although simple, will be found very ful c rum holes one on each side, which latter when the bent arms will catch on the sides of efficient for tbe intended purposes"and it is a afe placed at su ch a distance that the case the box, a nd the s c re w will consequently be useful improvetnent on the ordinary method will be in equilibrio when balancing the gauge I forced against the lid, and the latter yielding of uniting together the axle and shaft. box and a genuine coin. to the Impulse will dose on the hox. COMPRESSED-AIR RAILROAD BRAI{E .• -. Figure 1 . 11 � ______________ ______ ---s Figure 2. The annexed engravings represent an im-! kepb constantly working while the locomo-I bhe half pulley, and the other to the winch provement on Railroad Brakes, invented by tive is in motion, and air IS [oTced through the P. By turning the winch, the half pulley is