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steam--the heat represented in which 1s pure waste unless utilized in a feed. water heater or for other purposes-- is insufficient to heat the water to the desired temperature, it is advisable to supplement this auxiliary supply by steam taken from the low pres- sure receiver, inasmuch that the work the steam might do in the low pres- sure cylinder is very much less than the useful work that may be got out of it by allowing it to condense in, and give up its heat to, a feed water heater. When an engineer or superinten- dent can be shown that reliable feed water heater will be a source of actual saving to the extent of ten per cent to 15 per cent of his coal bill, and that expenses will be cor- respondingly reduced in other direc- tions, he is inclined to give the matter of installing such a heater in the plant or plants in his charge serious consideration. The Griscom-Spencer Company, who manufacture the Reilly multicoil feed water heater for. both marine and stationary uses, has given a great deal of attention to the scientific study of feed water heating, and, as a result, have perfected the construc- tion and design of their theater and accumulated a large amount of data on steam plant operation and econ- omy that places them in a position to be valuable advisers on this sub- ject. In this study their attention has also been brought to the many requirements that make for a good heater, enabling them to embody in their Reilly. feed water heater the experience gained from this source and also their long experience as manufacturers. In the construction of the feed water heater, great care has been exercised to provide a heater combining with great efficiency acces- sibility for inspection or overhaul. Engineers can appreciate the ad- vantage of a compact heater of this type, as in the limited accommoda- tion of an engine room the over- hauling or repairing of a large and cumbersome heater, installed very often in cramped quarters, is no light task. Access can be gained to every internal part of the Reilly multicoil heater without the necessity of break- ing any pipe connections, and the coils are so arranged as to be easy of renewal in case of accident. The Griscom-Spencer Co. are at all times glad to discuss with engineers the particular conditions that may be met in a specific. plant and advise ac-_ cordingly. Reilly | 'TAE MaRINE. REVIEW >ANCHOR WINDLASS. The accompanying cut shows a new anchor windlass which the. Dake En- gine Co. of Grand Haven, Mich., has recently brought Olt, and iteas pronounced to be a very superior machine for steamboat work. They make them in two sizes, and either make them with or without the cap- | Ts patents. on internal combustion engines and has employed Charles E. Sargent as the engineer of its gas engine department. Mr. Sargent has a wide reputation as an engineer and in 1898 designed, it is claimed, the first horizontal tan- 'dem double-acting gas engine, which was a wide departure from the ac- cepted practice of those days, when NEW DAKE ANCHOR WINDLASS. stan attachment for upper deck. The engine is attached to the windlass by means of a worm and the worm- wheel, and back geared 1 to 2, which decreases their speed and gives them great power. It would be well to get their prices and description of this rig as the windlass is spoken of very highly on 'account of its strength, durability and simplicity in handling. ANOTHER MANUFACTURER OF BIG GAS ENGINES. As an indication of the rapid develop- ment in the manufacture of big gas en- gines and the importance of the field oc- cupied by this type of prime mover, it is of interest to note that another manu- facturer of large Corliss steam engines 'has actively taken up the manufacture of gas engines and is bidding strongly for engines in medium and large sizes. The Wisconsin Engine Co. with its works at Corliss, Wis., which has built 'some very large and successful Corliss steam engines, is building gas engines for al! services in sizes from 400 B. H. P. to 5,000 B. H. P. The engines utilize natural gas, producer gas, coke-oven gas or blast-furnace gas in the Otto cycle (4- cycle), and are of the horizontal tandem type. Sargent twin-tandem double-acting company controls the and This the most prominent manufacturers of gas engines declared such a type was im- practicable, and doomed to failure. However, the largest and most success- ful gas engines are of the horizon- tal twin-tandem double-acting 4-cycle type, and with one exception this is the enly type in which large units are being built in this country. The gas engines built by the Wisconsin Engine Co. bear some of the distinctive features of their big Corliss engines, and utilize in design most of the Sargent patents. The design is remarkably sim- ple and embodies features which are of considerable interest to the engineer and power user, e. g., there is but one poppet valve for each explosion chamber, and as this is located on the bottom of the cylinder the cumbersome and unsightly air and gas pipes, as well as the stairs, galleries and railings found on most horizontal tandem engines, are entirely eliminated; provision is made for pre- venting the dangerous pressures caused by possible pre-ignitions; and the engines are started automatically. Tests of even small Sargent engines show a heat consumption of less than 6,000 British thermal units per brake horsepower-hour. This company has recently shipped some large steam engines to such con- cerns as the Illinois Steel Co., Jones & Laughlin Steel Co., Packard Motor Car Co. American Sheet & Tin Plate Cor