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Aupust, 1912 "O" Metropolitan injegtor discharges into the after end of this manifold. There is one 4 x 33% x 5 indé pendent, duplex, piston, horizontal fresh water pump placed on the star- board side of the ship on the for- ward engine room bulkhead. The suction and discharge are, respect- ively; 2 in. and 1% in. The suction and discharge are connected to the fresh water tanks, which are placed in the boiler room. There is one 5% x 5 x 5 independ- ent, duplex, piston, horizontal sani tary pump placed on the starboard side of the ship and whose suction is taken from the sea. The suction and discharge are, respectively, 3 in. and: 2 in; There are two dependent, horizont- al, plunger .bilge pumps, 4% in. diameter. by 4-in: stroke, each pump deriving its motion from a pin driv- en into' the forward end of the crank shaft. The pump body is bolted to the outboard side of the bed plate of each engine, the: suction, 3 in: diameter, is connected to the bilge, while the water is discharged through 2%-in. pipes directly overboard. There is a double-cylinder 5 x 5% steering engine, steam and hand com- bined, made by the Hyde Windlass Co.,,.Bath, Me. and placed on 'the port. side of | the. ship, . connecting with the rudder quadrant by means of chains. Electrical Equipment a' 25-kilowatt ° Crocker- direct-connected turbine, which lighting the There is Wheeler generator to.. a. Terry. <steam furnishes current for ship.' This outfit is placed on the main deck, starboard side, just aft the engine platform. The switch- board is placed on the port side near the entrance to the engine platform, the whole being within the engine well. | : The .ash gun is placed at the star- board; side of the ship on the forward side of the coal bunker bulkhead. The gun consists of the hopper into which the ashes are thrown and there discharged overboard through a 7-in. extra heavy pipe, check valve and deflector, which is riveted to the side of the ship. A water jet at the top and bottom of the gun furnishes the necessary power to. discharge the ashes. There is one vertical, duplex, plunz- er hand pump, required by the United States laws, placed on the main deck, aft. Each cylinder is 434 in. diameter with a stroke of 6 in., making a total capacity for each cylinder 106 cu. in, greater THE MARINE REVIEW The Thousand Islander carries life saving equipment for 1,000 passen- gers. The Monitor Type of Vessel By Arthur H.. Haver The special feature of the "Mon- itor' type of vessel is the application of two corrugations on the outside of the ship. They are in the form of two hori- zontal projections between the load waterline and the bilge, and extend along the main portion of the vessel until they merge into the ordinary form of ship's ends. . Their effect in' a 'way 1s to sub- due the waves, making a more sea- kindly vessel. When the ship rolls the amplitude of the roll is reduced, whilst the period of roll is increased. This 'action: 1s; also "elt: in the fore- and-aft pitching and. 'scending. The form', of the. corrugatrons, whilst adding to the displacement and wetted areas, has the important effect upon the ship that it requires less expenditure of horsepower and coal consumption to propel her: at a given speed when compared to a plain vessel of identical dimension, form and fineness. The corrugated form of the shell has considerably more inertia and strength, so that the stiffness is enormously increased in every direction, lateral, vertical or horizontal. Vibration is, therefore, practically unknown in all weather. Unlike - plain "Ships: "of any type: or form, this side increases in. strength as she heels over, and when carry- ing different cargoes, such as iron ore, the easy action is marked and rendered as comfortable as ordinary vessels with ordinary cargoes, the action of the corrugation reducing the roll in the same manner as bilge keels: The strong form of side, giving ability to resist crushing strains or blows from impact, makes a firmer, truer and more rigid side, so that the thickness of shell need not be so great and the supporting frames need not be so numerous. Two vessels have been built and are satisfactorily working, whilst three others are building. From the experience gained, extend- ing over two and three-quarter years, it has been proved conclusively, and is now admitted by the profession, that this type of vessel can econo- mize 16 per cent of coal and horse- power, whilst carrying about 3 per cent more. displacement, which is equivalent to 20 per cent reduction as compared with ordinary vessels of Zor the same dimensions, form and fine- ness, and with the same propeller and engines. The size of the two vessels built, the Monitoria and Hyltonia, fis 279 ft. by 42 it. by 20 ft, 744 im. 15 10 draught, and, instead of requiring about 780 i. h. p. for 834 to 9 knots, they are propelled, although carrying 100 tons more displacement,. with only 630 to 650 i. h. p.; which means a saving in coal per day of between two and three tons. This economy of working admits of the vessel carrying extra remun- erative cargo by the amowtnt of the saving in the cost and the weight of coal' not put.-on boatd, so. tliat On -a- round voyage the cargo an which freight is paid is something like 6 per cent in excess of that of a similar plain ship. Finally, there is not a vessel on the market, patent or otherwise, but is capable of being further improved by the application of corrugations, 'n making a stronger, more econom- ical and better seagoing vessel. When the designers of a plain-sided vessel have exercised all that ingenuity and skill can suggest to make her a per- fect vessel, it is still possible by adding these corrugations further to improve her. The greatest obstacle the pioneers of this type have met with is the conservatism of many who think these. facts are impossible of attain- ment, because the prevailing theories fail to account for them. Yet those who have closely inquired into the improvement have, without exception, been convinced of its truth and ac- curacy, and that it is in no way op- posed:to true theory. It is announced that the Cunard Line has decided to appoint a "staff captain" for the express liners Maure- tania and Lusitania. The duty of the staff captain will be to maintain dis- cipline, conduct boat drills and have the management of the crew under his direction. This officer will also assume full charge at any time that the captain may be ill or exhausted. This move is in the direction of greater safety, as with greater ships comes greater responsibility, and it is presumed that the staff captain will be of equal ability to the captain of the ship. The steamer Forest City, which formerly ran between Cleveland and Port Stanley, has been transferred to Lake Superior and will run be- tween Fort William and Isle Roy- ale, being operated by the Lake Coast Trading Co.