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VOL. 47 CLEVELAND MAY, 1917 NEW YORK COMPARATIVE TESTS SATURATED AND SUPERHEATED STEAM. LEHIGH VALLEY R. R. CO.’S TUG PERTH AMBOY IN TOWING SERVICE PERTH AMBOY Saturated Superheated steam §=—— Steam Duration of Vest... . 02-6. ..3 0. 47 hr. 35 min: — 54hr. O min. Total Tonnage of Tow.......3 73. ..... 5522 : 3502 Boiler Pressure Av : | 186 4.4 187.8 M. Eo PoP. ue Av... |... - 63.570 4 $2.8 ods Pe ee ee 40 8 807 ee Lo Pee ; 137. 8 Ret 2M. EPs ; © ok eS 2/9 Vacuum (Inches) — ie 2243 Coal per L H. P. bow th : Fuel Economy—per cent.............. — Indicated ‘Thrust .......25.2,,52... 0. = 20772 22900 Weather Ge ee Light breeze, winds, moder- strong head ate head wind wind and sea New Vork , = ‘ > e ° Ye Alphabetical List of Advertisers, page 80 Contents, page 5 ; ( Classified Advertisements, page 79