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April, 1919 NOTICE To Emergency Fleet Corporation Shipbuilders Installing Turbine Units The McNab “LOGOMETER” is an instrument specially designed for, and is approved by, the Engineering Section of the Emergency Fleet Cor- poration for installation in the Engine Room under Technical Order No. 104. For particulars apply to THE McNAB eee BRIDGEPORT, CONN. FORD & GEIRRINE, “SAN FRANCISCO, CALIF. Manufacturers of STAR BRAND *BLOCKS*~ Special Blocks of all styles for all kinds of heavy work STRONGEST BLOCKS MADE Blocks and Pumps ‘OR MARINE CONTRACT- PUMPS :& RS, Sewer Departments, Weter Works and Railroads. BOSTON & LOCKPORT BLOCK CO. 124 Condor Street EAST BOSTON, MASS. NEW YORK CITY CHICAGO SAN FRANCISCO 83 South Street 413 Fort Dearborn Bldg. 110 Market Street RITCHIE Compasses, Binnacles, and NAUTICAL Instruments SOLD IN ALL PARTS OF THE WORLD Magnets for Adjusting Purposes. E. S. RITCHIE & SONS NAVY STANDARD BROOKLINE - MASS. BINNACLE THE MARINE REVIEW 155 Our Work in the Marine Field is to meet its every temperature instrument need. Zycos Temperature Instruments are especially designed to fulfill all demands for accurate tem- perature indication and reliable temperature records. The many years of interesting experiments and careful manufacture down to the smallest detail, have raised the prestige of Zeos heat indicating, recording, controlling instru- ments to the highest level. Let us place our literature within easy reach—by permit- ting us, you may be led to investigate some of our products at your leisure. Tycos Type Angle and Straight Stem Thermometers Fycos Recording and Indicating Thermometers Automatic Temperature and Pressure Regulators Mercury Vacuum and Absolute Pressure Gauges Engraved Stem Thermometers Hy¢grometers, Hydrometers Thermo-Electric and Radiation Pyrometers Taylor /nstrument Companies Rochester, N. Y. There’s aZycos or Zaplor Thermometer for Every Purpose. 365 Walker s Patent Ship-Logs Are Known Throughout the World for Their Accuracy and Durability Walker’s Patent “Cherub” II Ship-Log UNSOLICITED TESTIMONIAL “I have much pleasure in stating that your Cherub Log has been in constant service for a period of over four years, and has given no trouble what- ever. It has during that period registered some 190,000 miles and I have no doubt this is the finest Log in the market at the present time.”’ Thomas Walker & Son, Ltd. Makers to the British and Many Other Navies 58 Oxford St. Birmingham, Eng. Please mention THe Martine Review when writing to Advertisers be aati ete ig