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364 'equipment will be needed. president. : ; The Moore Shipbuilding Co., Oakland, Cal., plans 'to erect a wooden floating drydock, consisting of five pontoons, each 90 x 125 feet, with a 20-foot overhang on each of the two end pontoons. . The lifting capacity of the dock will be 20,000 tons H. D. Sandstone is x0 New Trade Publications Cine (i (i (nnn ca a -- wal WELDING.--A folder has just been issued by the Metal & Thermit Corp., New York, which describes the operations inyolved in making a weld on_ the 13%4-ton broken upper jaw of an alligator shear used by Joseph Josephs & Bros., Modena, Pa. The break welded was 80 inches long and varied from 4% 'to 25 inches in thickness. + KNOCK-DOWN BOATS.--A small illustrated book- let published by the Marine Iron Works, Chicago, is called "Steel Boats" and covers exclusively, boats which are built for shipment in knock-down shape. The feature of these boats is the labeling of all parts to correspond to the parts of a detailed erec- tion drawing which "is furnished with each shipment. These boats can be furnished up to 200 feet. in length. ey MAGNETIC COMPASS.--A pamphlet describing a magnetic compass designed for merchant-marine serv- ice has just been issued by the Kelvin & Wilfrid 0. White Co., Boston. It is pointed out that this compass is fitted with an azimuth mirror and that the card is lighted from underneath. The under part of the bowl is made of heavy glass. The pam- phlet contains several illustrations and describes the compass in detail. SOOT CLEANERS.--The Vulcan Soot Cleaner Co., Du Bois, Pa., has issued a bulletin describing its front end and rear end types of soot cleaners. The company states that since 1906, approximately 2,000,- 000 horsepower of return-tubular and Scotch-type ma- rine boilers have been equipped with its cleaners. The bulletin shows how the cleaners are installed in settings of typical construction. The bulletin will prove of interest to engineers and others who are in- terested in soot problems. CRANES.--A. 50-page illustrated bulletin has been issued by the McMyler Interstate Co., Cleveland, in which cranes, especially those for use in the ship- building industry, are described and illustrated. 'The data given are representative of present day practice. The types of cranes described and illustrated in the booklet are: Horizontal cantilever revolving cranes, which include hammerhead, pintle and turntable de- signs; boom jib cranes, of the pintle and _ turntable designs; standard locomotive cranes and overhead traveling cranes, MARINE ENGINES.--A bulletin describing marine engines for small craft has been issued by the Hall-Scott Motor Car Co., San Francisco. The en- gines described are a 6-cylinder unit developing 200 horsepower and a 4-cylinder unit developing 130 horsepower. It is pointed out that these engines are modeled after the company's airplane engines which gave extensive service in France during the war. Several interesting facts pertaining to the de- velopment of the company's aircraft engines are in- cluded. LIFE SAVING EQUIPMENT.--Alfred Varley Sims, New York, has issued a pamphlet describing his safety suits for use aboard ship. It is pointed out that the device is practicable and easily put cn over the wearer's ordinary clothing. It is said that it will keep a person afloat in comparative comfort and that it permits the wearer to float upright in the water without the use of foot weights. The pamphlet describes the suit fully and points out that it can -be worn without inconvenience and that it permits 'the wearer to swim with freedom. CUTTING AND WELDING EQUIPMENT. -- Nine bulletins enclosed in a loose-leaf cover, in which carbo-hydrogen cutting and welding equipment is de- THE MARINE REVIEW and each pontoon will have its own pumping, plant. The pontoons will be so connected with a locking device and will be so arranged that they can- be submerged separately and one or more small boats docked simultaneously. The pumps will be electrically driven. Construction of the dock is expected to he completed in about six months. HLULUUUAUUUUL LL scribed and illustrated, are being circulated by the Carbo-Hydrogen Co. of America, Pittsburgh. Each bulletin is devoted to its own particular subject. They are: Service; cutting torches and tips; welding torches and tips; regulators; regulators and small gages; lead-burning outfits; portable cutting outfits; safety first bulletin, and a bulletin which contains illustrations and descriptions of the various accessories. TEMPERATURE CONTROLLING EQUIPMENT.--The Taylor Instrument Cos., Rochester, N. Y., has issued a 422-page catalog describing its instruments for the indicating, recording and control of temperature. Many special applications are illustrated, showing the manner in which the instruments can be adapted to various temperature needs. Much explanatory matter descriptive of construction and principles of operation is given. The list includes thermometers of every description, index and recording thermometers, hydro- meters, pyrometers, temperature and pressure regu- lators, barometers, absolute pressure and draft gages. CONTRACTORS' AND STEAMBOAT SUPPLIES.-- R. Gracey & Sons Co., Pittsburgh, has just issued a catalog devoted to iron and steel supplies' used by contractors and aboard steamboats. The catalog is well illustrated and gives complete descriptions of various tools and appliances which include ratchet pulling and pushing jacks, steamboat ratchet towing jacks, tow chains, wheel stirrups, flange bolts, circle bolts, firing tools, blower tubes, hoisting chains, gen- eral purpose hooks, pile caps, pile points, pipe clamps, dolly bars, rivet busters, water-cooled tuyeres for forges, hand-forged lathe tools, and a variety of other tools. PLATE PUNCHES.--An illustrated, 22-page cata- log has been published by the Norbom Engineering Co., Darby, Pa., describing punches, punch tables and reamers. One of the punches operates at 45 strokes per minute and has a built up steel frame construction which differs considerably from the standard C-frame type. The operating gears are direct-connected to a motor mounted on the punch. The head is of the floating type, riding on the plate except during the acthal punching. The plate punch tables described are designed to punch up to 6700 holes in 9 hours, and range in size from 20 to 40 feet. The reamers illustrated are from 5 to 1,9; inches in diameter. BUSINESS AND FACTORY SUPPLIES.--L. F. Grammes & Sons, Allentown, Pa., are issuing an illus- trated catalog devoted to their office and factory sup- plies. Numerous illustrations are included and the articles listed are fully described. These include paper fastening machines, advertising novelties, loose-leaf binders, marking stencils, card and_ ticket holders, fastening clips, stencil dies, envelope openers, hinges, trucks, platform scale, metal seal presses, pen and pencil clips, badges of various types, time checks, etc. One of the interesting articles described is a metal paper bailing machine. It is pointed out that this device is fireproof and easily operated. OIL ENGINES.--Heavy-duty oil engines are de- scribed in an attractive catalog recently issued by the Gulowsen Grei Engine Co., Seattle. The catalog is well illustrated and describes the company's engines fully. It is pointed out that these engines operate on crude or fuel oils of asphalt or paraffine base con- taining 1800 B.t.u. or more per pound and_ haying A gravity of not less than 24 degrees, Be. Attention is drawn to the fact that these engines run satisfac- torily without water injection which is used in Euro- pean practice. Data are included which show com- parisons between operating vessels with coal and oil. "guns, July, 1919 It is also pointed out that no standby expense 8 involved while in port. i ANSALDO WORKS.--An interesting booklet has just been issued which graphically describes the famous Ansaldo Works of Italy. This firm manufactures among other things, ships, airplanes, locomotives, Projectiles, engines and too's. It is pointed out that the conception of the works is due to Count Camilo Di Cavour when he was prime minister of Piedmont, They were started in 1846 in Sampierdarena under the directorship of Giovanni Ansaldo who gave his name to the works. The company also operates its own foundries and steel works. The booklet is profusely illustrated with views showing different departments of the works as well as some of the finished products, The scope of the company's manufacturing activities jg remarkable. LIGHTING APPARATUS.--The Benjamin Electric Mfg. Co., New York, has issued an illustrated, loose- leaf catalog describing its marine lighting and signal- ling apparatus. Among the devices described are watertight deck and ceiling fixtures, angle bulkhead fixtures, drop fixtures, hand portable lighting fixtures, nonwatertight shade holders, watertight junction boxps, eonnecting blocks, receptacles, switches, attaching plugs, covers, gaskets, glass globes, protecting guards, puzzers, bells, gongs, horns, push. buttons, panel boards, gas and vapor proof fixtures, etc. The catalog is complete in every respect. Two types of illustra- tions are used, halftones made from photographs and reproductions of line drawings to show details. Many of the latter are dimensioned. The descriptions of the various articles are well written and concise. GENERATING SETS.--Engberg's Electric & Mechani- cal Works, St. Joseph, Mich., has issued an attractive illustrated catalog describing its direct-current steam- driven generating sets of from 1 to 50-kilowatt ca- pacity. These are self-contained units and are de- signed for use on board ship and ashore. Various component parts of the units are illustrated and de- scribed. Many reproductions from line drawings are included which show sectional views. It is pointed out that every machine is given a severe practical test under actual operating conditions before shipping to make sure that it will function properly when in- stalled. Special features of the engine are a one- piece crankshaft, machined from forged steel; outside admission piston valve; a self-aligning outboard bear- ing for the shaft, and a one-piece bed plate. STEAM MOTORS.--The Steam Motors Co., Spring- field, Mass., is issuing an attractive illustrated catalog describing its appliance for generating power. 'The device described is a direct-connected turbine engine. It is pointed out that the salient feature of the de- vice is that it is not a complete turbine in itself but when it is connected with its driven member it becomes an integral part of a complete unit. 'This feature, it is pointed out, makes the device a com- pact 2-bearing unit with any standard design of driven apparatus. Many of the illustrations shown are made from line drawings which show the working mechanism. Of especial interest to naval architects and marine engineers is the blower set, designed for inducing forced draft aboard ship. Attention is drawn to the fact that 166 vessels recently built by the American Shipbuilding Co., Cleveland, and the Manito- woe Shipbuilding Co., Manitowoc, Wis., are equipped with this device. FRICTION CLUTCHES.--The Williams Foundry & Machine Co., Akron, 0., is issuing a catalog de- scribing its friction clutches. These appliances are said to be particularly adaptable to dividing line shafting into units and for handling the power col- trol of heavy machinery. As a factor of safety, it is pointed out, these clutches are of advantage, due to the fact that in case of accident involving one machine, or a group of machines, power can instantly be thrown off. The catalog is of especial interest to plant maintenance engineers as the device is described fully. It is featured by a roll-type toggle joint which permits easy actuation of the parts in engaging and disengaging. The catalog includes also some valuable belting data and tables giving the horsepower of pulleys and belts, horsepower transmitted by steel shafting, sizes and weights pé foot of cold rolled steel shafting, circumferences and areas of circles, weights and measures used in the United States and general mathematical rules.