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£2 Coller Patent Safety Sectional Water Tube Boiler. Cuts shown on this page fully illustrate the appearance in general of the Coller boiler, which has already attained a reputa- tion, having an advantage over other boilers of its class by reason of the steam and water dome standing perpendicular in the center of the boiler, instead of horizontal, whereby the roll- ing of a yacht in no case can cause water to be drawn over into the engine, thereby avoiding all centrifugal separators or supet heaters. With engine wide open there is no fluctuation of water, as in this boiler it can be readily seen that the water is in the bottom instead of the top, and as the main 20 inch central dome, 6% feet long, is two-thirds full of water, the amount therein contained is nearly equal to that of the old style shell boilers of the same horse power. 'he main steam dome is a constant feeder through the four large pipes at the bottom of the dome to 'the base of the boiler for all the upright smaller sections. One secret of the Coller boiler making steam rapidly is the very equal distribution of heat arouud the upright sections. The outer side of the pipes are so arranged that there is nearly double the area for draught that there is in the center near the large drum, and consequently the heat takes a straight shoot up in- stead of going direct to center flue, or through center of boiler. By this arrangement over 25 per cent. of fuel is saved. This boiler is well adapted for all purposes and more practically for marine work, where light weight, quick steaming, positive se- curity against priming and high pressure are required, as from 200 to 300 pounds can be carried if desired. get steam in four minutes after lighting the fire. Eighteen inches above the grate is the main steam and water drum, which is provided with a central flue passing vertically therethrough, and affording a passage for the caloric current through the drum. Communicating with the hollow base through the couplings at the corners, are the large vertical pipes that connect with the lower end of the drum through the horizontal pipes that extend radially from said drum. There is a series of straight vertical pipes that communicate at their lower ends with the base and extend entirely around the fire space. 'The upper ends of these pipes are coupled by means of the elbows to the sinuous pipes provided with return bends, which cause the pipes to traverse the fire space diametrically in radial order and stand in vertical columns, their upper ends be- ing expanded in the drum, with the interior of which the pipes communicate; the lower end of each alternate pipe being connec- ted with the base of the drum through the horizontal radial pipes. Aniong the features of this style of boiler are the following: - Absolute satety from disastrous explosion, fuel economy, thor- It is no trouble to MARINE REVIHW. --. ough circulation, quick steaming and plenty of steam, steady water line, no cleaning of fiues, water space or removal of hand- hole plates, perfect combustion, high pressure that can be safely carried, small space and light weight, allowance for contraction and expansion, and accessibility of all parts. For prices apply to the Coller Steam Yacht and Engine Works, Detroit, Mich. A Side-Wheel Steam Yacht. There are many owners and masters of vessels, practical men, who would for many reasons build a side-wheel yacht upon considering mainly the question of comfort. To these,. the ac- companying engraving of the side-wheel steam yacht Clermont will prove interesting, although this type of boat is, of course, not without its disadvantages if it is desired to use it for other than special service. SIDE-WHEEL. STEAM YACHT CLERMONT. The Clermont has a wooden hull 160 feet 3 inches long over all, 150 feet 6 inches on load line, 25 feet molded beam, 43 feet over guards, 10 feet 8 inches deep and 5 feet 3 inches draft. The engine, which was built by the W. & A. Fletcher Company, New York, is of the beam type, with cylinder 4o inches in diam- eter and 6 feet stroke. The wheels are of the feathering pattern, 17 feet in diameter and 6 feet 6 inches face. There is one steel return-flue boiler, 8 feet 1 inch in diameter and 26 feet long; the usual working pressure 60 pounds. 'There is also a donkey boiler carrying 125 pounds steam, a steam windlass and other fittings. The boat is lighted by electricity, the dynamo being driven by an engine with 5x6-inch cylinder. The actual speed of the Clermont in dead water is 18 miles an hour with 46 revo- lutions per minute. At this speed the engine develops about 800 horse power. She was built for cruising and not for speed. The Clermont is handsomely fitted up and has plenty of accom- modations for passengers and crew. 'The engraving was origin- ally printed in the Engineer of New York. Grain Stocks Still Increasing. The following table, prepared from reports of the Chicago board of trade, shows the stocks of wheat and corn in store at the principal points of accumulation on the lakes on Jan. 21, 1893: ; Wheat, bu. Corn, bu. CMTCAR OR scr ce sc ec 13,322,000 5,639,000 Te cet 15,695,000 266,000 USES totes 2,324,000 26,000 Detroit Je RaGRC SEO peta tek Sanne 1,774,000 15,000 INO eG clei eres ee 3,600,000 I, 408,000 BUH OR ear tee ea, 3,650,000 TIL,000 mOtalees. Keck a fs, 40, 365,000 7,465,000 The steam barge Lothair burned to the water edge a few days ago in her winter quarters at Windsor.