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Superheat & Efficiency (Continued from Page 15) steam was used. The savings shown above in dol- lars per year of operating cost do not represent the total advantages from the use of superheated steam. To them must be added the reduced maintenance and repair costs. ac- cruing through the unloading of steam generating equipment. With a reduced fuel consumption of more than 9 per cent there would be a corresponding reduction in steam con- sumption so that the. condenser feed pumps and auxiliary machinery would be relieved of an appreciable portion of the duty under which they would have to operate with saturated steam. Unloading the boilers alone to an extent of 9 or 10 per cent would so relieve the intensity of firing, de- terioration and the formation of scale as to be of tremendous advantage to the operator without showing di- rectly in a reduction of the annual fuel bill. A Record Cargo of Rye in Steamer Lemoyne On April 21 the S. S. Lemoyne of the Canada Steamship lines bound HIGH EFFICIENCY NORDBERG STEAM TOWBOAT ENGINE BUILT FOR UPP SURE AND LOW PRESSURE CYLINDERS—SHOP VIEW AT N ORDBER BRAKE HORSEPOWER AT 17 50 from Duluth, to Port Colborne, Ont., had on board 538,817 bushels of rye, weighing 15,087 tons, the great- est cargo of its kind ever carried by a Great Lakes freighter. The S. S. LeEMOoYNE launched in August, 1926 is 630 feet long and has a beam of 70 feet, which is wider than any other bulk freighter of the lakes and can carry a greater cargo than any other ship, when loaded to the same draft. Including this record cargo of rye, ships of the Canada Steamship lines now hold the record in five of the ten commodities listed by the Great Lakes Carriers association. The records are held by two ships, the LEMOYNE and the DONNACONA which until this year was known as the W. GRANT MOoRDEN, and are as follows: Ore cargo in the DoNNACONA, 1920, 14,137 tons; wheat in the LEMOYNE, 1926, 518,000 bushels; in the DonNna- CONA, 1919, 504,908 bushels; oats in the DONNACONA, 1915, 760,066 bu- shels; rye in the LEMOYNE, 1927, 538,817 bushels; mixed grain in the LEMOYNE, 1926, 551,000 bushels. Although the steamer Car. D. BRADLEY which was launched April 9 at Lorain, O., is 8 feet longer than the LEMOYNE, her beam is five feet narrower. For this reason the LkE- MARINE REVIEW—June, 1927 MOYNE will continue to rank as the largest bulk freighter carrier of the Great Lakes. April Lake Levels The United States Lake Survey re- ports the monthly mean stages of the Great Lakes for the month of April as follows: Feet above mean Lakes sea level UDCEION: ceriiccscisteiescssecceccussheavecubedesustese 601.41 Michigan-Huron 578.78 Shireen (OH Wh canara sare tr 574.15 HINTE! ices dassrecbencaveccs 571.75 ERT Te eva casas ccaeten es sunco ce uiehievesvenssseaeses 245.97 Lake Superior was 0.10-foot higher than in March and was 1.31 feet higher than the low April stage of a year ago. Lakes Michigan-Huron were 0.30-foot higher than in March and they were 0.96-foot higher than the low April stage of a year ago. Lake Erie was 0.65-foot higher than in March and was_ 0.94-foot higher than the low April stage of a year ago. Lake Ontario was 0.26- foot higher than in March and was 1.05 feet higher than the April stage of a year ago, 0.06-foot above the average stage of April of the last ten years. The import movement in 1926 was approximately 44,800,000 tons. ER MISSISSIPPI BARGE LINE—RIGHT HAND HIGH PRES- G MFG. CO., MILWAUKEE WIS.—_TWO UNI , , : SOF REVOLUTIONS PER MINUTE IN EACH BOAT—THREE BOATS IN ALL ae