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July, 1914 are over 120 indicators and gages arranged here, together with a barom- eter, indicating the atmospheric pres- sure, a clinometer showing the trim of the ship, and clocks, which are electrically controlled--the whole show the engineer officer in charge not only what is going on in the three engine rooms, but also in the most distant parts. of the ship. Here also dre found indicators for recording the speed of each turbine, together with instruments which show the direction of rotation at any moment, thus en- abling the engineer officer to be cer- THE MARINE REVIEW draulic power from the starting plat- form. The firing of the four boiler rooms is controlled from the starting plat- form, electric gongs being sounded in each boiler room, thus indicating at regular intervals when coal is re- quired in the furnaces. Each boiler has eight furnaces, and in conjunc- tion with the electric gongs already mentioned, numbers appear automat- ically on dials and the furnaces are fired in the rotation indicated. Above the starting platform a mod- el plan of the ship is outlined in pol- STERN OF THE AQUITANIA, SHOWING HER PROPELLERS tain that each turbine is responding to the controlling levers operated by him. On the starting platform, on each side of the ship's center line, are sit- uated the hand levers controlling the Manetivering valves. These maneuver- Ing valves are of very large dimen- sions and an idea of their size may be had from a consideration of their Weight, which is in the vicinity of 25 tons each. Their operation re- Wires the provision of a separate small steam engine for each valve, these being brought into action by the controlling levers as easily as ne would open or shut a water tap Pet In' case of emergency these valves can also be operated by hy- ished metal, together with the longi- tudinal and transverse lines repre- senting the water-tight bulkheads throughout the entire length. Corres- ponding to the position of the water- tight doors in these bulkheads, are fitted small colored electric and by an ingenious electric contriv- ance these lamps immediately light when the doors in question are closed from the bridge, a similar indicator being also fitted there. The water- tight doors are shut from the bridge each day, and it is evident that should any door fail to act, the chief en- gineer 1S informed by the particular lamp representing the door, failing to light. He can thus at once take steps to have it closed. lights,. 253 The starting platform is in direct communication with the chief engin- eer's office, which is really a central bureau, being in direct communica- tion with the bridge, steering gear, engine room, electric light engine room, doctor, purser, chief steward and other officers. It is not, however, solely devoted to the propulsive control of the ship, but, in addition, most of the ma- chinery and appliances required on board solely for the convenience and comfort of the passengers, can be controlled from its vicinity. As the modern, liner has grown so also has the demand for machinery and ap- pliances of all kinds, and this has added enormously to the responsibili- ty of the chief engineer and his staff, which in the Aquitania number 34 engineer officers and 350 men. Engineering Staff In passing it will be interesting to note that the duties of about 30 per cent of the engineer officers are en- tirely confined to the care and opera- tion of appliances, installed solely in connection with the passengers and their accommodation. For example, there is a ventilating engineer, who is responsible to the chief engineer for the air supply and temperature of all staterooms, public rooms, salons and passenger accommodation throughout the ship, speed of fans, opening of louvres, and the amount of heat sup- plied and regulated according to cli- matic conditions. Charts are placed before the chief. engineer . showing the temperature throughout the vessel every hour of the day. The deck engineers are solely con- cerned with the supply of hot and cold salt water for the large swim- ming bath and morning baths, hot and cold fresh water in- the state rooms and lavatories, evaporation of sea water by a large plant carried aboard capable of supplying 300 tons of pure fresh water per 24 hours, filtered and iced water for drinking and cooking, washing water for kitch- ens, pantries and sculleries, the pro- vision of water for sanitary purposes, water for washing decks, and the reg- ulation and supply of water for the fire service throughout the entire ship, also the hydraulic pumps for closing the watertight doors. The engine room is the center for the various services mentioned, and from there, in the vicinity of the starting plat- form, may be regulated the tempera- ture and delivery of the services in question. They are responsible for a large power oil engine and dynamo, "The Emergency Lighting Set", for use in