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holes and similar defects in castings and forgings made good. The Worcester Pressed Steel Co. have accomplished some difficult auto- genous welding with aluminum, practi- cally overcoming the trouble from the oxide which forms on the surface of aluminum when exposed to the atmos- phere. Although aluminum melts at a comparatively low temperature (1,200 degrees Fahr.) it rapidly conducts and absorbs heat and requires a: compara- tively high local heat to obtain the best results. : CYCLONE HOIST. The Cyclone. high speed chain hoist, man- ufactured by. the Chis- holm=*.&° > Moore: . Co., Cleveland, is one: of the most popular hoists on the. market: The bear- ings of the. hoist have graphite bronze bushings. They are self- lubricating, requiring no oil, and will run indefinitely without cut- ting. The lift wheel, that is the sprocket wheel which carries: the lift chain, is cast in one place with the spur wheel that drives. it. This dou- ble wheel turns freely upon a hollow shaft rigidly supported at both ends in the frame. The spur wheel is en- circled by a yoke having internal teeth meshing into the spur wheel teeth and driven with a gyrating movement about it by two eccentrics placed di- ametrically opposite. The hand wheel shaft passes through the hollow main shaft carrying at the further end a Pinion which drives two spur wheels, one on each of, the two eccentric shafts. The number of the teeth in the spur wheel divided by the difference be- tween the number of the spur wheel teeth and the number of the internal teeth of the yoke equals the number of revolutions of the eccentric neces- sary to turn the lift wheel once. THE Marine REVIEW (In the one-ton size, the spur wheel has twenty-one 'teeth, the yoke twen- ty-four internal teeth, and the eccen- trics turn seven times to each revolu- C Rutt no ' tion on the lift wheel.) The teeth are cut with accuracy and work smoothly together. There ate a number of them in 'contact, insuring great strength. .The eccentric shafts have bearings. at both ends and_ roller bushed connection with the yoke. All bearings have self-lubricating graphite bronze bushings. under the full load the frame will not spring and bind the working parts. The extreme simplicity and great strength of this construction is apparent. It is practicable for the twenty-ton size, as for the half-ton without undue increase in size or weight. The friction loss of this movement jis so slight (the efficiency is about 80 per cent), that it has been found practicable to gear the hoists to a 'of screw hoists. There. are no overs: ' hanging bearings in the hoist, so that 49 cE very high speed, higher than that - of any other hoist yet manufactured, without increasing the hand wheel pull above that of other slower hoists. The. one-ton Cyclone overhauls only 2914 ft. of -hand chain to raise the -- maximum load 1 ft. with a pull of 85 Ibs. The 2-ton Cyclone overhauls 3914 ft. of hand chain to raise the maximum load 1 ft. with a pull of -- 125 lbs. Joe The average speed of the best types oe of screw hoists in the 1-ton size is 60 ft. overhaul of hand chain with a pull of 88 lbs. and in the 2-ton size 90 ft. overhaul of hand chain with a _ pull of 120 Ibs. to raise the load 1 ft. So that with the same power applied, the load can be raised with the Cy oy clone high speed hoist more than twice as rapidly as with the best types Comparison is made with the screw hoist, as. most users of chain blocks are familiar with the working of that type. The automatic brake permits the spinning of the hand wheel in either direction when there is no load, locks the load with perfect safety, and yet permits its free lowering by a very | slight reverse pull on the hand chain. SPENCE PACKAGE FREIGHT Ao CONVEYOR. - To reduce the amount of labor and trucking necessary in the loading and unloading of package freight the Spence Mfg. Co., St. Paul, Minn., has devised a portable, motor driven con- veyor operating between the dock and boat. The conveyor is built in vary- ing lengths as desired and consists of a truss frame on which is mounted a flexible endless traveling apron. This apron is built of jointed slats with an 'individual panel for each separate box, barrel, bale or bag loaded on. In the center of each panel is a button which ~ is pressed down by whatever is put on it and the-finger with which it connects is thus made to engage with a counter