This is an improvemflnt npon a formerly patented !nvention of the same inventor. designed to insure'an equal disttibution of theair throngh a tuyere opening into the heated fuel in the stack, anltto permit of readily repairing burned parts of the pipe. The original Invention was illustrated and described in the SCIENTIFIC AKERICAN of July 13, 1895. A series of re movable ringe loosely surronnd the pipe, which Is made in sections, with tuyere openings between them, and the pipe has a conical

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... on the base of which is an annular fiange holding a protecting ring. VAPOR OR STEAM CONDENSER. -Albert Hoberecht, Ensenada, Mexico. This condenser com prises a casing having an offtake or stack at ita upper end and a steam Inlet at its lower end, there being In ita sides air Inlets connected with cold air supply pipes, while horizontal baffie plates within the casing direct the aecending steam and vapor past the cold air jets. The amount of cold air admitted may be reJlUlated bV damp ers, and the water of condensation is passed to an outlet at the bottom of tbe casing. SURFACE CONDENSING TUBE.-This is another invention of the same inventor, providing a con densingtube having internal and external condenidng surfaces of a material which will conduf!t heat quickly and of a minimum thickness, whereby the air will have increased cooling action on the outside of the outer tube and the Inside of the inner tube. The inside and outside faces of the tubes are strengthened and reinforced by spiral spring wire coils, and both the wires and tubes are strengthened by spiders or transverse supports, so that the tubes will have strength to withstand vacuum and pressure. Rail \Vay A.ppliance ... CAR FENDER.-Augustin M. Chavez, Mexico, Mexico. This fender Is designed to rescue a per son lying on tile ground as well as one standing up in the path of a moving car, being, It is claimed, thoroughl} antomatic in Its action. and of simple, durable and inex pensive CODl!truction. It Is made in two scoop sections adE.pted to balance one another, and the forward or re ceiving section being only slightly above the surface of the gronnd. Covering both sections is a bed of netting, in which one struck by the fender is received, without liability to injury. RAILROAD '.rIE PLATE.-Alexander B. B. Harris, Bristol. Tenn. This is a fiat plate having tongues or split extensions adjacent to the spike holes, the tongnes having projecting toes or fianges adapted to be expanded or forced ontwardly and embedded in the tie by the thrust cf the spike. The plates are designed to prevent the wear of the tie beneath the rail, for which a solid, firm, and secure anchorage is formed. CAR WHEEL AND TRACK.-Christian W. Flint, Port Townsend, Washington. To permit a train to run aronnd cnrves with great speed, withont dan ger of deraIling and withont inclining th� tracks, this in vention provides for having two rails for snch Bf'Ctions, one rail having its tread higher than the other, and the elevated tread being beveled downward toward the other rail, the wheel also having two treads of different diam eters, with a dividing fi ange between the treads. The gage of the rails on a curve will be abont half an inch wider than on a stl"aight track, to prevent the fiange of the onter wheel binding on the head of the onter rail. Electrical. ELECTRIC LAMP.-Charles E. Quimby. New York City. This invention provides for an electric lamp arr anged singly for attachment over one eye, or for a pair of lamps to be mounted on a spectacle frame, the incandescent fi lament occupying an annular globe in a suitable casing, the globe having an Internal diameter of three-eijlhths to half an inch. The ends of the Incande scent fi lament are attached to wires sealed in the glass, and insulated wires furnishing the current are connected with the lamp by binding screws, the lamp being at tached by a universal joint to a band pass ing around the head of the user. mecbanlcaL CA RPENTERS' PLANE OILER.-Theo dore M. Anderson, New Whatcom, Washington. To re dnce friction between the plane and the wood being dressed this inventor provides a lubricating attachment aceording to which the plane has a baa e portion with par allel and perpendicular sides between which is a block, a bit monnted between the sides being supported by the block, in which Is an oil chamber, a wick In which Ie adapted to extend to the under side of the stock. GRINDING MILL.-George C. Ahrens, Gillespie, IlL This is an improved mlll for grinding coffee, spices, cereals, etc., and is designed to grind large quantities withont much exertion. It has crushing and grinding swfaces arra nged one above the other, the crushing burr forming a feed for the grinding burr, and the stem of one of the bnrrs being hollow to receive the stem of the other burr. The stems are locked together in nnison and are operated by a handle. BALL BEARING.-Frederick C. Avery, Chic_go, Ill . This inventor has devised a means of pro tecting a ball bearing against dust or grit, and a bearing that will retain the balls when the cone is removed, tbe oil being applied directly on the balls, simplifying and cheapening the construction without any addition in weight. The nsnal fiange of the cone is cut away and Its onter portion Ie made cylindrical and of lese diameter than the @hell or the hall holder, the space being made nee of for a speclal form of dnst protector, combined with wh ich Ie an on receiver. ... eellaneon .. AIR SHIP.-Manoel V. Coutinbo, Para, Brazil. This invention comprises a balloon with side fiange 'lxtenillnK aronnd the bow W serve as an aeroplane, J titutifit �mtritJ •• r APRIL 4. 1&}6. 1ts npper and lower portions forming snbstantlally two conical sections, and a slee"" In the central portion hav hi a 1iex1bJe connection to engage nalyards, The ap paratus Ie designed to be navigated by an electric or other motor, side propellers forcing the car np or down or forward or back, and rendering its steering easy. MULTIPLE PROJECTILE. -Larence A. Johnson, San Francisco, Cal. This is a projectile more eepeclaJJ y designed for long range nse, and Ie made In three or more sections which may be separated from each other and arr anged to form a projectlle to be fired from cannon in the usual manner. The separable sec tions of the body are each formed with a bore adapted to contain a charge, the sections each having a shank fitting in the bore of the next section, dowel pins engag Ing recesses in the opposing section, and the sections having interlocking external rlngs .. SLED PROPELLER -Willis A. Bradley, Gem, Idaho. This invention provides a stesm-propelled ice boat, which may also be nsed as an engine of a train of boats to be drawn over the Ice. It comprises a frame having adjustably mounted and independent runners at each side and a stee ring ronner at one end, while a motor operates a spiked drive wheel. The boat may be guided and controlled by levers and appliances in the pllot honse. DUMP WAGON.-George Vaughan, Salt Lake CIty, Utah. The bottom of the body of this wagon is composed of a nnmber of drop doors which may be opened by the driver by turning a crank, the arrangement being snch that the entire load may be dumped in a pile, or it may be distribnted over a given area. the driver not having to leave his seat. The Improvement does not in terfere with the carrying capacity of the wagon. VEHICLE WH EEL BEARING. -John Pettinger, Santa Barbara, Cal. The hub box, according to this improvement, has an Integral spindle adapted to engage a tubular axle, reducing the friction of the hear ing parts to a minimum, while the wheel hub, by reason of the long spindle, easily maintains its proper relation to tbe axle, so that wabbling Is prevented and the wheel is held to run true. Abundant lubricant may be passed between the spindle and the tubular end of the axle, ob viating the necessity of frequent lubrication. EXTRACTING GOLD FROM SOLUTIONS. -Gile. O. Pearce, Colorado City, Col. To extract and recover gold and platinnm from aqueom solutions, par ticularly sea water, this inventor provides for passing the solutions throngh a mass of v�table carbon having as sociated with it snlphate of iron, oxalic acid and tartaric acid, to secure the rednctions and depositions of the metals on the carbon, which is afterward burned, reduc ing and melting the metals into a mass.