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1901.) MARINE REVIEW. * LS MODERN STURTEVANT STEAM FAN. The rapid increase in the use of small independent-driven fans which has marked the progress of the last few years has led to the design of both motor and engine driven fans to meet this requirement. Where electricity is not available as motive power the steam fan becomes a natural substitute. The B. F. Sturtevant Co. of Boston, Mass., has re- cently brought out a line of small sizes of steam fans of which the ac- companying illustration gives a good idea. These fans range in total height from 380 in. to 50 in. and weigh from 350 to 950 lbs. These are designed for creating pressure of at least one ounce per square inch when engine is operated under &0 lbs. of steam, and for this purpose the en- gines have to be constructed to run from 650 to 1,250 revolutions per minute, according to the size. Such high speed naturally requires the utmost care in the design and construction of the engine. Of course certain difficulty arises from the small type of the engine itself, the minimum size of cylinder in this size being 24% in. in diameter by 2 in. stroke. In all cases, however, these engines are equipped with piston valves, with marine type connecting rods, counter-balanced crank and complete continuous sight feed oiling arrangements. All moving parts are adjustable for wear and the cylinder is lagged to reduce condensation. A hand wheel is provided for starting the fan, which latter is of the well known Sturtevant construction, con- sisting of a steel plate housing with light and carefully balanced steel plate wheel within. This wheel is mounted upon the extended engine shaft and draws the air through the inlet from the farther side. These fans find especial use in small mechanical draft plants where they may be operated independently of any other source of power and find particular opportunity for service on board steam yachts and similar small vessels. TO BE SEEN NEAR THE EXPOSITION. Though not strictly a feature of the Pan-American itself, there will be located a stone’s throw from the exposition grounds a plant which will be well worth the inspection of the visitor interested in mechanical subjects. We refer to the large plant which is being constructed by the Buffalo Railway Co. for the purpose of furnishing power to aid in the operation of its street railway lines during the exposition period, when a great increase in its traffic is to be expected. One of the features of this plant will be the installation of a large mechanical induced draft fan to produce the draft and handle the eases of combustion from a boiler plant that will have a nominal capacity in the neighborhood of 2,500 H.P. This fan was built by the Buffalo Forge Co. It is 24 ft. in diameter, of the three-quarter housine. up-blast type, and is rigidly constructed of steel plate, braced and stiffened with angle irons. The fan is designed as an exhauster with an inlet 9 ft. in diameter and will be driven by belting to a Buffalo 18 by 12 horizontal, center-crank, class “A” engine. In order to keep the bearings cool, a constant circulation of water will be maintained around them. The short stack into which the fan will dis- charge will be of sheet steel. This particular plant illustrates very nicely some of the inherent ad- vantages of mechanical induced draft. For instance, there is. no need of a tall heavy chimney, and again, since the material is all steel plate the plant can be constructed and installed in a minimum length of time. Once in place, this apparatus is in complete control over combustion and renders the performance of the boilers independent of those conditions of weather, wind, temperature and the like which influence plants served with chimneys. The intensity of the draft is in proportion to the fan wheel velocity, and hence can readily be altered to suit varying condi- tions. One cent a mile to the Pan-American Exposition at Buffalo via the Nickel Plate road on May 15 and 29. Train leaves Bellevue, O., at 12:15 midnight, leaving Cleveland at 2:06 a. m., and arriving at Buffalo at 7:35 a.m. Tickets are good returning within three days on any one of our peerless express trains where scheduled to stop. For rates and time of train at intermediate stations see bill, call on nearest agent or address C. A. Asterlin, 1) P.-A., Ft..Wayne, Ind» or B.-A; Akers CBG a, Cleveland, O. 49, May 29. “BENEDICT-NICKEL” Seamless Tubes for Condensers contain no zinc nor any weakening metal. They resist all electrolysis and corrosion. The tubes are formed by a hot-rolling process which by a single operation transforms a solid cylindrical billet of the heated metal into a seamless tube, perfectly homogeneous and absolutely flawless. “The tubes are then cold drawn to the sizes desired, which process gives them a perfectly smooth finish INSIDE and OUTSIDE. aid . : ” 2 : e 2 ” : ss ” he U. S. Navy to use ‘*Benedict-Nickel” tubing for condenser purposes. | Tubes of ‘*BENEDICT-NICKEL”’ which ae ae A EE LS sah WEE rte American Line Steamer “St. Paul” after 28 months’ service were in periect condition, e are also manufacturers, in a large way, of CopprR Sheets and Bolts; Seamless CoppER and Brass Tubing for Siomieueees and other Marine Work, and can furnish TOBIN BRONZE, Rods and Sheets, in any quantities desired. BENEDICT & BURNHAM Mea. Co., BOSTON, 172 High Street. A treatise on “Electrolysis of Condenser Tubes’’ mailed upon request. Seen ee nn EEEnnann Mills and Main Offices, WATERBURY, CONN. Depots: NEW YORK, 253 Broadway.