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: crows-nest around the head laid on steel floor beams. All floors have in addition to the heavy planks a wearing surface made of l-in. hard wood flooring laid diagonally. The "TAE Marine ReEvIEw the motion of the trolley along the boom. These cabs are very well pro- vided with windows, in fact three sides are all of glass. The covering used is JEFFREY GRAB BUCKET FILLING, first or lower floor contains the hoist- ing engine, and the engine for driv- ing the crusher; the second floor con- tains automatic scales; the third floor a four roll crusher; the fourth floor receiving hopper; the fifth floor is at the level of the boom which supports the trolley, and there is in addition a sheave which allows easy access for the in- spection of the bearings located at this point. All the floors which are out- side of the house proper are well provided with hand railings. The heavy galvanized corrugated -- sheet made of rero'led iron. © Extending (from -- the lower engine floor to (tne fourth or hopper floor is a housing made of heavy corrugated galvanized iron sheet. The hoisting machinery used to handle the bucket and trolley consists of one Lidgerwood Steeple Standard hoisting engine fitted with_ two cylinders 15x24-in. direct con- nected to 30-in. drums equipped with 54-in, double cone friction automatic brakes. The trolley engines consist JEFFREY RUBBER BELT CONVEYER CARRYING COAL IN POWER HOUSE. cabs protecting the operators are two in number located at opposite sides of the tower, In one cab is placed the bucket man who controls the hoisting, lowering, Opening and closing of bucket, in the Other the trolley man who controls of a pair of 10x 12-in. engines direct connetced to a 16-in. drum fitted with cone friction and band brakes. The other machinery in the tower is driven by a double cylinder single acting Westinghouse engine. The arrangement of levers for con- 59 trolling the hoisting engines is very simple, and each operator has but three to handle, one for each hand, and one for his foot; the foot lever in each case controlling the throttle on the engine. The bucket with which this tower is equipped is the second of its type which has been placed in service along the eastern coast, but still is only one of a number of the large group which are working suc- cessfully in handling sand, gravel, broken stones, coal and other mate- rials at different points throughout the interior states of the country and along the Pacific slope. It differs in many points from the ordinary clam shells and will handle successfully ma- terials which the clam shells can not penetrate. In this particular instance equipment will have to handle large lump coal more than half the time and in order to obtain the desired ca- pacity, the bucket must be able to handle the large coal as rapidly as the small. The equipment is designed for continuous capacity of 120 tons per hour from barge to receiving hop- per. The hoist from barge at mean tide water to the hopper is about 60 ft. and the length of travel is 57 ft. In the hands of expert runners with this height of hoist and travel, coal can be unloaded at the rate of 200 tons per hour. The entire equipment was designed and built by the Jef-. frey Mfg. Co., Columbus, Ohio, with the exception of the parts previously noted. YARROW GUNBOAT. The Portuguese government has placed a contract with Messrs. Yarrow & Co., Ltd. of Glasgow, (formerly of Poplar, London,) for the construction of one of their very shallow-draught gun- boats for Macao. This vessel. will be 120 ft. in length by 20 ft. beam, and will draw, loaded with 25 tons, 25 in. The guaranteed speed is 12% statute miles an hour. The vessel will be armed with suitable artillery, and the various sta- tions where the officers and men will stand will be bullet-proof. The pro- pelling system will be by means of a Yarrow watertube boiler and _ en- gines driving two screws working in tunnels. fitted with Yarrow's patent hinged flap aft. The vessel will be com- pletely put together at Messrs. Yarrow's new works on the banks of the Clyde. She will be shipped in pieces, re-erected, riveted together and launched in China. The steamer Fred G. Hartwell, build- ing for the Mutual Steamship Co. at the yard of the Toledo Ship Building Co., Toledo, will be launched April 4.