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

_will still be in good shape. ssi Se - THE Marine Review eo 160 -- i OA 4h" Dimensions Length Overall 274 ie Length Bet Perps 29 0 0" Breaath Molaed 47: g" Depth Molded 260 = a - Fic. 7--Muipsuie Section STEAMER ALPENA. AND DEPTH from 'the forward boiler room bulk- head to the peak bulkhead in four compartments. This arrangement not only . gives sufficient ballast to make the ship weatherly when light but goes far towards an unsinkable ship. In fact the outer shell might be badly ruptured and,. even though loaded, if the inner skin were intact the. ship The Wyan- dotte is designed to carry 3,000 tons om a draught of 15 it., the limit fixed by harbor conditions at Alpena. The cargo is loaded from a high pocket dock, similar to the ore docks at up- per lake ports, and 3,000 tons can be loaded in about one hour. The entire cargo can be put overboard without the necessity of men entering the car- go hold. The discharge gates are man- ipulated in the tunnel under the hop- pers where the rate of feed is in full view ~and can be adjusted as desired. The gates are hinged and operated by a . handwheel and chain by which they are raised or lowered. The propelling machinery of the Wy- andotte consists of a triple expansion 18--31--50 engine ------ and two boilers 11 36 7 10 in. diameter and' 11 ft long working at 180 lb. and fitted with How- den draft. With 900 indicated horse- power the speed loaded is 11.6 miles per hour, The Wyandotte has One sO sic- cessful that a second ship, the Alpena, -was built early in this year to the same design but,as shown in Fig. 7, of some- what larger dimensions and designed to carry 4,000 tons on 15 ft. draft. Cer- tain modifications were also introduced in the conveying machinery, as for in- SAME AS WYANDOTTE, But BEAM INCREASED. stance in the inclined, central conveyor steel sections are substituted for the rubber belt with the result that a more obtuse angle is permissible and the head is therefore carried further forward, as seen in Figs. 5 and 6. The shear leg is done away with and a clearer deck is obtained. Steam en- gines are substituted for motors and the unloading rate increased to about 800 tons per hour through the use of wider conveyors. The propelling machinery of the Al- pena consists of a quadruple engine 1714--25144--37--54 ---- and two boilers 13 36" i, -2 in, diameter: by 41 ft 6 in. long working at 210 Ib. and. fitted with Howden hot draft. The Alpena has shown remarkable economy in fuel per horsepower, as will be seen by re- ferring to the report of steam trials in THe Marine Review July, 1909, Both ships were built at Detroit; the Wyandotte by the Great Lakes Engineering Works, and the Alpena by the Detroit yard of the American Ship Building Co. The conveying machinery was designed and built by the Stephens-Adamson Co., Aurora, Hh. A description of a recent European design of self-discharging cargo ship will appear in the December number. Ss. S. TORTONA. The fine twin-screw steamer Tor- tona, built by Swan, Hunter, & Wig- ham Richardson Ltd. Wallsend-on- Tyne, to the order of the Cairn Line of Steamships Ltd., Newcastle, of which the managing owners are Cairns, Noble & Co. took - Messrs. her trial _ Italian government, November 1909. trip recently from the Tyne. The Tortona has been specially designed for the emigrant trade between Italy and Canada, and has accommodation in the 'tween decks for 1,100 to 1,200 persons, besides accommodation for about 40 first class passengers. The dimensions of the vessel are 464 ft. length overall; 54 ft. 214 in. beam and 40 ft. deep to the shelter deck, and she 'has a gross tonnage of about 7,900 tons. She has been built to the highest class at Lloyds and conforms to the regulations of the British Board of Trade and the American Emigration Laws. In her arrangements for the emigrant trade she has also been built according to the regulations of the and in this re- spect she is certainly thoroughly equipped, nothing likely to conduce to _ the comfort and convenience of her pas- sengers having been overlooked; in addition to well arranged galvanized iron sleeping berths, there are mess rooms, kitchens, hospitals, dispensary room and nursery. She is fitted with refrigerating apparatus, a large por- tion of 'tween deck space having been~ insulated, which will be cooled to a temperature of 40 degrees Fahr. on the cold air system, and further chambers of insulated space will be cooled to 15 degrees on the brine pipe system. The ventilation of the ship has also received special consideration. She is also fitted with the Marconi system of wireless telegraphy, and the Willet-Bruce patent steam whistle, which works automatically, and has in this case been fitted for the, first time to a Tyne-built ship. Her deadweight carrying capacity is 8,600 tons, and the arrangements for handling the cargo are very complete. Her powerful twin-screw engines were built by the Palmer Shipbuilding @ tron ©o. of Jarrow, and on the trial developed a speed of 15 knots. NEW MACHINERY FOR STEAMER COLUMBIA. The Northwestern Iron Works, Seattle, has recently received orders for new machinery for the steamer Columbia, of Everett, Wash. owned by the Everett Navigation Co. - The machinery ordered includes a new main engine, condenser and circulating pump. The engine will be a fore and aft compound with cylinders 10 and 22 in. in diameter and a stroke of 15 in. The steam pressure will be 165 Ibs. per sq. in. The condenser and circulating pump will 'be of the usual pattern. The machinery will be com- pleted by Nov. 15.