The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

May, 1910 larger proportion of the Lake Superior ores will not; in fact, it is common to see an almost, if not quite, vertical face of several feet in height produced by the unloading machines. These qual- ities also facilitate the use of the grab bucket unloader in the case of the Am- "TRAE Marine REVIEW erican ores and operate against it in Swedish ores. At the same time, the output of less than 12 tons per hour per man is extremely low and the port time of the ship compared with the length of voyage is correspondingly high. The Sieurin Ore Discharging Gear OR discharging iron ore, recent ex- periments on board the specially de- signed ore carrier, the S. S. Paulina, has demonstrated that for quck dispatch and economy, the Sieurin discharging gear, Hic. 1--Scoor in tHE Hormp. FILLED: the patented device of Capt. Sieurin, of Gothenburg, and principal of the Sieurin Discharging Gear, Ltd., of London, is the most perfect and economical that -has up to the present been devised. Speaking generally, the appliances car- ried by ships for discharging their car- goes, both bulk and otherwise, are in most instances extremely crude. Steam- ers usually carry on their decks a num- ber of winches, the collective power of Fic. 2--Scoorp AFTER BEING RAISED FROM THE Hop, READY TO BE DELIVERED OverBOARD BETWEEN THE Two STATIONARY DERRICKS. which is equivalent to some hundreds of men, and yet when bulk cargoes have to be dealt with, scores of men are frequently employed in shoveling the same. Clearly the proper course is to utilize the power of the winches, not only to lift the cargo, but also to pitch it out, from the remote parts of the ship's hold, and thus do away with the heavy expense of shoveling it. The Sieurin gear has. been designed with this object in view. It enables the cargo to be discharged by men driving the ship's winches, thereby saving the great number of men usually employed in the hold. Even stanchions, engines amidship and shaft tunnels in the holds are -not obstacles to the effective working of the Sieurin gear. The scoop is just as capa- ble of filling itself around the stanch- Fic. 3--Scoop oN THE RoAD TO THE TRUCK ON THE QUAY. ions, and in the afterholds of steamers with engines amidships, as amidships un- der the hatch, in fact the scoop works on each side of the steamer freely and not even the tunnel has been found an obstacle to the efficient working of the scoop. A noteworthy feature of the Sieurin winch and gear is that it can be employed for every purpose required of an ordinary ship's winch, while any ship can be equipped with it, whether of special design or of the ordinary type, and the winch and gear take no extra space away from the steamer. The Sieurin gear was originally de- signed for coal discharging, and many steamers in Sweden and Germany have been working with it in coal discharging, and up to the present over 700,000 tons of coal and coke have been handled by this gear. The advantages of this sys- 173 tem having been made evident in hand- ling coal, which advantages consist in a very great saving in the cost of dis- charging, and also a very considerable economy in time, the gear has lately been further developed for dealing with ore. The class of mineral that has been so far dealt with has been Spanish and so called washed ore. Two or three years ago it was tried in Scotland 'to discharge this class of ore by the use of grabs, but: the fact was that the weight of the grab was so large in com- parison to the quantity of ore it could take, that the use of grabs was found impracticable. Another reason that made the use of grabs unsuitable for this washed ore was that the ore did not run easily and formed into vertical walls. With the Sieurin gear it has now been proved that by comparatively small winches, in the case of the S. S. Paulina, of the same size as when used for dealing: with coal, and having cyl- inders of 8 in. by 10 in. diameter, and a specially constructed scoop, having a capacity of about 2 tons of the above washed ore, very good results have al- ready been obtained. This scoop, when working in the holds, not only takes the cargo vertically under the hatch as the grabs do, but the scoop also travels away to the very far end of the hold, and picks up the ore. All the shoveling by hand is done away with, except at the very last, when cleaning up the hold, when only a few men are necessary. When the scoop has been filled by be- ing dragged in the cargo by the winch, it is hove up out of the hold under the stationary derrick over the hatch at the same time as the steam winch, which . is heaving it up, is taking in the slack of another rope leading to the block on Fic. 4--Tue Scoop Hancinc OVER THE Truck, Ready To BE EMPTIED.