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Meek Ri E. R Boo ev I ew 45 the stroke of all 14 in. The illustration gives an excellent idea of the general design of these pumps. The boiler feed pumps are in duplicate, of the single, out- side end packed, pot valve type with 8 in. and 16 in. steam cylinders and 7 in. water plungers, 14 in. stroke. The ar- rangement of boiler feed deserves special mention. It is the practice in this service to shut down the air pumps when the steamer has made fast in her slip since she may lie half an hour or two or three hours, and as it would entail endless trouble to be continually starting and stopping the feed pumps when the hot well supply is cut off by the stoppage of the air pumps a large hot well or feed tank is installed and which holds about 8 tons of water. Into the bottom of this tank the after air pumps discharge, the overflow is from the O 1 © | heater referred to the exhaust steam from pumps, fan en- gines, electric engines, steering gear, etc., are all conducted. Even the wastes from the heating system are trapped and saved and no heat is allowed to go to waste. The exhaust steam is passed through a Cochrane separator which effectually eliminates all oil and makes it possible to utilize the con- densed and distilled water for boiler feed. The fire pump is of the duplex outside end packed pot valve type, 8 in. by 5 in. by ro in. A sanitary pump is fitted in each engine room and connected together to the general water service which supplies the quarters as well as the engine room water service. Governors are also fitted to these pumps, making the entire water service automatic. Two to-k. w. direct connected lighting sets of the Fuller 72 5UN TES Se S --<-- iat Te o MARINE REVIEW GENERAL DRAWING OF ENGINE OF CAR FERRY DETROIT. top overboard. A tank pump, 8 in. by 5 in. by 10 in. duplex, delivers water from this hot well into an open heater of the Cochrane type, and which so far as known is the first open heater installed for marine purposes, and from which the feed pumps take suction. The tank pump and the feed pumps are fitted with Gardner pressure governors and the feed supply is controlled entirely by the feed valves at the boilers. If closed the pressure governor immediately stops the feed pump and when opened the pump at once responds without further attention. With the stopping of the feed pump, of course, the water level in the heater rises and in doing so operates a float which closes a valve in the delivery from the tank pump and the governor on the latter immediately puts the pump out of action. Thus the water tender in the boiler room operates the whole system by the regulating of his feed valves. Into the se Co.'s make are installed, the smaller set for day lighting in engine and boiler spaces. The electric installation also in- cludes a large search light with 18-in. projector. The boilers are four in number of the Scotch type, two double ended, 13 ft. diameter and 22 ft. long, and two 13 ft. diameter and 11%4 ft. long, built for a pressure of 150 lbs. steam. All furnaces are 44 in. diameter of the Morison removable corrugated type. Water spaces separate all com- bustion chambers in both single and double ended types. It frequently happens that at the season of the year when the ice is at the heaviest the coal supply is most uncertain and its quality inferior, and to insure the steam supply under the most adverse conditions a system of mechanical draft on the closed ash pit system is fitted. For all ordinary service not more than a part of the boiler plant will be required and it