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8 MARINE REVIEW. Big Triple Expansion Diagonal Engines. Engines illustrated on this page are probably the most ae triple expansion engines ever fitted toa paddle steamer. They are of a type that has been fitted by the Fairfield Ship Building & Engineering Co. of Glasgow to several big side-wheel steamers for the Zeeland aes ship Co.,a corporation operating a big line of passenger ships on t i North Sea between Queenborough, England, and Flushing in Holland. The latest of these vessels is the Prins Hendrik, which was guaranteed to make 21 knots in deep water. The Prins Hendrik and her sisterships (three of them are duplicates) are required to make the run of 110 knots between the two points named in aboutsix hours. Fora considerable portion of this distance the steamers are in shallow water and hence the necessity of high speed in deep water. The shallow water is also a prime cause for the adoption of this type of engines, as it was the aim of the management to overcome the annoyance of vibration when dete high speed. In order to understand something about the vessels for which these engines were constructed, it may be noted that they are each 320 feet long, 35 feet 6 inches broad and 24 feet deep to the upper- most deck. There are three decks, and accommodations provided are for _ -- holds in the vessels, one before and one abaft the engines, In: anh stokehold there are three large single-ended boilers of the ording Scotch type, fitted with forced draught. As each boiler has four fur. naces, there are consequently twenty-four furnaces in the vessel, The working pressure is 170 pounds per: square inch, and the horse power upwards of 9,000 indicated. The description and engraving are from the Engineer of London. An Important Point in Admiralty. Last week, the district court for the northern district of Ohio, sitting at Toledo, heard the personal injury claims against the passenger steamer City of Toledo, growing out of the collission between that steamer and the schooner Madaline T. Downing, in tow of the tug Fran, S. Butler, in August last. Ida Sanderson was the. original libelant, and in her cause four other passengers intervened. The steamer was held. not at fault, and the libel dismissed, together with two of the intervening libels. The four interveners had become such by special leave of court and in the prayer of their libels had asked that they be permitted to submit their claim with the original libelant, and did not pray fo; BIG TRIPLE EXPANSION DIAGONAI, ENGINES FOR PADDLE STEAMER. the most part that of a daylight trip but the steamers have in each case state rooms affording sleeping accommodation for 1£0 first-class and seventy-two second-class passengers. aes: The three cylinders of the engines are placed side by side to work a three-throw crank shaft. Cylinders are 51, 75 and 112 inches diameter _and the stroke of piston is 78 inches, The high pressure cylinder has a piston valve, while the intermediate and low pressure cylinders each has a flat slide valve, all being worked with the usual double exceutrics and link motion valve gear. Both the crank and paddle shafts are of mild steel, the crank shaft being connected to the paddle shaft by flanged couplings and bolts. Between the cylinders andthe supports for the crank shaft the condenser is placed, which is of cylindrical form and con- structed of boiler plate, the necessary condensin g water being supplied by a large centrifugal circulating pump worked by two independent steam engines. A feed heater, feed filter, an evaporator, and all other such modern appliances are also provided in the engine room, 'The starting and reversing of the main engines is effected by a steam and hydraulic reversing engine. The whole of the paddle wheels, includ- ing the floats and feathering gear, are of the Siemens-Martin steel, and the floats are formed with a curved surface. There are two stoke process of any kind. On dismissing the original libel, proctors for the steamer asked that the same decree be entered against all the interveners. Two of the interveners were not represented at the hearing, and the de- cision of the court as to them, was held in abeyance. Without the special prayer the court could probably treat the intervening libels as original libels and issue process thereon against the steamer. In view of the special prayer of the interveners, this case is probably without precedent, and it is doubtful whether the court has power to order the steamer detained. The ratio of consumption of fuel to the indicated horse power in the year of 1870 equalled three to one; today the ratio of the modern system does not exceed two to one, ora saving in fuel equal to 30 per cent. With the introduction of forced draught, equal to six inches of water under the grate, the ratio of fuel consumption measured in terms of horse power to the unit of grate area, has been increased from twelve to one, to twenty toone. The increased steam pressures, steadier work- ing and greater number expansions, and the substitution of steel, have enabled 50 to 60 per cent. given tonnage and displacement,--The Engineer, New Vork. greater motive power to be given toa ship of