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1901.) MARINE REVIEW. 7 19 from the main board, five motor-circuit switches. One of these is in cir- cuit with a pair of 50 H.P. motors, each operating a dry dock centrifugal pump by a downward vertical belt drive about 20 ft. deep. Another switch is in circuit with a 20 H.P. motor operating a winch for lifting stern posts, etc. Other switches are in circuit with two 8 H.P. motors operating winches for lifting material aboard, and another is in circuit with a port- able stern-tube boring gear of about 8 H.P. These pumps, winches and boring gear are all located near the power house. The engine department feeder is a three-core cable .383 square inch conductor, running directly without break to the machine shop of the de- partment. The feeder ends in a large switchboard panel where, through a 1,000 ampere switch, are fed a set of bus bars, from which, through: five other switches, branch feeders to the distributing boards. 'There are in all five of these feeders, the boards being placed at convenient centers in the department. In the machine shop one 30 H,P. motor set on the ground drives 90 ft. length of overhead shafting. The speed is 860 revolutions per minute, the drive being by a belt 9 in. wide onto a pulley on the end of the shaft. Connected with the shaft are about twenty small lathes and slotting ma- chines. One 15 H.P. motor running at 570 revolutions per minute drives by belt a fan running at 800 revolutions per minute, providing draft for the smithy hearths. A 20 H.P. motor hung on its side to a column of the building drives' a length of shafting in the machine shop extension operating several large planers, band-saws and milling machines. In the machine shop extension there is also a 10 H.P. motor driving a very large boring mill. This motor is hung on the wall and drives the mill by belts and countershaft. A 25 H.P. motor drives the length of shafting opera- ting some thirty machine tools in the middle and lower bays of the ma- chine shop. There is-also a 80 H.P. motor driving lathes that range from 41% ft. center downwards, and one 20 H.P. motor driving shafting. Two of the overhead traveling cranes of the machine shop are being converted to single motor electric cranes and two other three-motor cranes are being installed. Just outside the machine shop is an electric winch driven by an 8 H.P. motor through a worm and pinion gearing. The winch has two warp ends and a barrel and is used for hauling purposes. In the erecting shop the distributing switchboard has thirteen motor switches in addition to the main switch. There are installed a 15 H.P. motor driving a large planing machine and two large lathes; a 10 H.P. TYPE 'C'? MOTOR OPERATING WINCH. motor driving a large milling machine; another 10 H.P. motor driving by a length of overhead shafting several large lathes; a 40 H.P. motor driving by a belt and countershafting an electric arc lighting machine; and a 30 H.P. motor, coupled by belt to the overhead shafting throughout the length of the erecting shop, drives, among other machines, several large side and vertical planers. From this board in the erecting shop there run also the circuits for a 30 H.P. motor driving the whole of the plant in an independent shop, known as the top-fitting shop, and also circuits for a 15 H.P. motor driving all the machine tools in the brass machine shop. The pattern shop is to be fitted with a 30 H.P. motor, and in the yard a winch for metal breaking is to be installed, both of which are also to be fed from the same board. Another distributing board is located in the foundry. It has five motor-circuit switches together with the usual main switch. In the foundry proper are installed two 50 H.P, motors, one hanging from the roof, driving two blowers, and the other, on the ground, driving two sand mills. A 20 H.P. motor is also fitted up for driving three 20-ton cranes. There are in-all six cranes, three in each bay; and all are to be fitted eventually with independent motors from the board in the foundry. Cir- cuits are run to two motors in the copper shop, each of 20 H.P. capacity, one driving a fan, the other the shafting. Another circuit runs to a 15 H.P. motor driving small machine tools in the jetty fitting shop. The other main feeder from the power station supplies current for the whole of the ship building department. It runs direct to a switchboard ~ TYPE "C" ALTERNATING MOTOR DRIVING SHAFTING. in the No. 2 shed, where all the plate work is carried out. Here it is divided into five circuits, four of which pass directly to other boards at convenient centers for the sub-division of the current to the various motors. An ammeter is placed on the board in each of these four circuits. The fifth switch is in circuit with the two 50 H.P.'motors which operate shafting, driving the punching, shearing, planing, bending and rolling machinery in shed No. 2, and also operate by an extension of the shafting two sets of hot rolls, 9 in. by 9 ft. and 17 in. by 12 ft. in No. 3 shed. On the other four circuits one leads to a-sub-dividing board along- side, where current is received through a' main switch and divided into eight distinct motor circuits, each with an isolating switch on the board. One circuit feeds a 30 H.P: motor, providing power for half of the plant in shed No. 1, where plate work, such asrolling, punching, sawing, grind- ing, drilling, etc., is undertaken. Other motors, fed direct from this board, are two of 20 H.P. each, driving a winch for lifting material to vessels on the stocks, and four of 8 H.P., driving winches for similar work. From the main distributing board a circuit runs to a distributing board in the shed, where angle-iron bending, punching, shearing, etc., is done by sep- arately driven machines. The circuits from this board are led to motors as follows: One 30 H.P: motor driving by belt and countershaft an air compressor for a riveting machine; one 10 H. P. motor operating a large tool which shears 1% in. material and punches up to 12 in. in diameter; a 5 H.P. motor driving by belt a horizontal angle bar cutter and squeezers; three 5 H.P motors, two pinion geared and one belt, driving combined shears and punches; one 5 H.P. motor driving by. belt a portable ang' bar beveller; a 5 H.P..motor driving by: belt'a horizontal squeezer; 7° 15 H.P. motor driving by belt a circular fan for the smiths' fires tributing board is also fixed in shed No. 1, having-six motor s: a main switch. A 30 H.P. motor '(in addition to the pr tioned, connected with the board in shed No. 2), driv shafting operating the remainder of the plant in shed" also one 10 H.P. motor driving the plant in the pl cipally pipe cutting and screwing machines, and the shop, principally circular and band saws; two 15 ¥ for smiths' fires in shed No. 1 and thrée 8 H.P. ' and pinion gears to winches, one in shed No. heavy forgings on trucks, one for hoisting materidi for general lifting at the jetty side. Two cables enter the joiners' shop and termir carr