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190z.] MARINE REVIEW. i 29 ELECTRIC LAUNCHES. Navigation is one of the latest fields to be invaded by electricity, and now small launches and even row boats are being driven by electric motors in an entirely satisfactory manner. In the accompanying illustra- tion is shown a half horse power motor, which is one of a line constructed especially for launch work. As will be observed, the motor is entirely enclosed, being practically moisture proof. If the motor is well protected or is to be used in fresh water, the weight is materially decreased by the use of aluminum parts where other metals are not necessary for electrical or magnetic purposes; although, if the motor is likely to be exposed to the salt water, brass or iron fittings are recommended because of the cor- rosive action of the salt water upon the aluminum. In the latter case the finished parts of the machine are copper plated for the same reason. The shape of the frame is such that two equal paths are provided for the magnetic flux, one on either side of the armature, a design which allows of great compactness. As the voltage is low the current is necessarily proportionately high, making the design of the brush holder a feature of great importance. The brush holder used with these motors is of the box type with parallel feed, making it possible to run the motor for a long period of time without any attention to the brushes. A special form of brush is used consisting of stratifications of woven copper gauze and car- bon, the outside layers being of the latter substance with a heavy copper plate. In this way are secured the advantages of the high conductivity of the copper and the wearing qualities of the carbon; the latter also prevent- ing the copper gauze from spreading out and sticking in the holder. A continuous metallic circuit is maintained between the brush and the holder COMPAGNIE GENERALE TRANSATLANTIQUE FRENCH LINE--UNITED STATES AND EUROPEAN MAIL ROUTE. New York to Havre-Paris in 'ess than one week. Steamers sail from New York every Thursday, at 10 a. m. Company's own vestibuled train from Havre to Paris in four hours. FLEET 70 STEAMERS. In New York service the following gigantic Twin Screw Steamers: "LA LORRAINE" (new) Twin Screw 15,000 tons 22,000 H.P. "LA SAVOIR'"' tone == 15,000. 225000 "LA TOURAINE"' (modern) '" ee 10,0005 85 12,0000. "L' AQUITAINE"? (modern) " 2). 10,000 °°, 16,000 Naval officers command above steamers, insuring the same strict discipline as on a man-of-war. These ships all have double bottoms and water-tight compart- ments, and prescribed routes are taken to avoid fogs. The above steamers contain every modern twentieth century equipment for safety, most luxurious accommoda- tions, and the cuisine is famous. The favorite route of the elite of both continents. For rates, plans and other particulars apply to EUGENE DE*BOCANDE, General Agent for United States and Canada, 32 Broadway, New York. MAURICE W. KOZMINSKI, General Western Agent, 71 Dearborn St., CHICAGO, OR TO LOCAL AGENTS. : ee IRON CEMENTS -- ; We have many like the following: April 26, 1901. To Whom It May Concern: We have used Smooth- On Iron Cement for]. leaks and fractures on }; Water Jackets of Gas Engines with satisfac- m tory results. We find it an economical way of making a durable repair. Hudson County Gas Co. P. S. Young, Secretary. The Smooth-On Iron and Steel Cements are dry metallic com- positions--which, when mixed with water, become a hard metallic iron that is insoluble in Steam, Water, Petroleum or other oils-- that will withstand an intense heat, and, the expansion and contrac- tion being the same as iron, is why they are sometimes called Magic Iron. When applied to a blemish in a casting by a skilled mechanic the blemish is removed. Unequalled for boiler patching and stop- ping blowholes in iron or steel castings; when metalized, Smooth- On is the color of cast iron and as hard. Write for our 60-page illustrated book telling all about the different Smooth-On Cements; it is free. Sole Proprietors and Manufacturers, SMOOTH-ON MFG.CD. 547 551 COMMUNIPAW AVE. JERSEY CITY AN.J. U.S.A. VREELAND TOMPKINS-- CHEMIST AND GEN. MANAGER so that no sliding or imperfect contacts are required to carry current. This makes an extremely efficient and satisfactory brush arrangement for work of this kind, allowing long wear with minimum attention and mak- ing heat losses, due to the flow of the current, insignificant. The machines are very economical in operation. The speed is low (1,000 R.P.M.) and as they are series wound, they use field' energy only in proportion to the load, thus modifying two of the most important sources of waste; namely, friction and heat losses in the windings. The voltage is usually low, from twenty to forty being ample in most cases, so that there is no possible chance of injury to the operator. The motor is usually supported in the stern of the boat by means of heavy braces which are bolted to the body of the motor. This line of machines is manufactured by The Holtzer- Cabot Electric Co. of Boston, Mass. Following are the officers of the Jackson Transit Co. for year of 1902: Samuel Mitchell, president; J. A. Stone, vice-president; A. S. Chis- holm, secretary; W. C. Richardson, treasurer and manager. A new chart of the Straits of Mackinac, in colors, has just been issued by the United States lake survey office, and can be secured through the Marine Review Pub. Co., Cleveland, Ohio. a Some interesting reading matter relative to very shallow draft power- ful steamboats for river navigation is mailed free on receipt of request by Marine Iron Works, station A, Chicaco. 5 '* Seaboard Steel Castings."' ES ee OF A GUARANTEE OF QUALITY. THE ADMIRAL" ANCHOR. OPEN-HEARTH STEEL CASTINGS a OF THE HIGHEST GRADE. THE LATEST AND BEST FACILITIES FOR CASTINGS UP TO STOCKLESS ANCHOR. 80 000 POUNDS WEIGHT. APPROVED By LLOYD'S. MACHINE WORK AND PATTERNS nee FURNISHED WHEN REQUIRED. ANCHORS CAST AND TESTED ON ae RAIL OR WATER DELIVERIES. ORDER, OR STOCK ORDERS CAPACITY, 1500 TONS PER MONTH Seaboard Steel Casting Co., GHESTER, FPA. "BENEDICT-NICKEL" Seamless Condenser Tubes are the only ones that resist electrolysis. Far superior to brass or copper. Our treatise on "'Electrolysts of Condenser Tubes" tells why--send for tt BENEDICT & BURNHAM MFG. CO. Mills and Main Office, Waterbury, Conn. New York, 253 Broadway. Boston, 172 High St.