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ENGINE OF 1 U.S.S.PQWHATAN. A.D.I849 >3l| CMCUKC OF ' U.S.S.fuS^ATAR trsoaasY theswe»u^ ^rui rw w.ramcwts cinni r>:n ms*s:: i msm mu.\ <iiiu, •U&f B* AJUtWUTt •EU.HWRaS.Sa. HOUSE POWFS U73.5TEMI PRESSURE S !!¦;. 70!*L WEIGHT OF lUCHINCRf BOg TORS. v.i -an !•¦.•» iii"4vm'. !'¦«!« m'tt~ :N3! (IF u.S.i'OHr'c-UU doAI rtU.*.'. OCSlOlCC B» TH£ BUPXtU OF 57SW EHCHHRMC 183! ENGINE OF U.S.TORPEDQ BOAT HQ.2.A.B.IB3I. ILLUSTRATION SHOWING THE ADVANCEMENT IN MARINE ENGINEERING. 1891. THE DRAWINCS SHOW THE RELATIVE SIZES OF THE ENGINES, BOTH BEINC OF THE SAME SCALE, MARINE ENGINEERING, 1849-1891. Built, by A. Mehaffy & Co., 1849. Uor.se power, 1,172, Steam pressure, 15 lbs. Total weight of machinery, 508 tons, Weight per horse power, 972 lbs. Built by Iowa Iron Works, 1891. Horse power. 1,800, Steam pressure, 250 lbs., Total weight of machinery, 45 tons, Weight per horse power, 55 lbs.