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| (i States, shipping board, and the con- tinued replacement of piston rings caused orders to be issued for the removal of the three waste heat type superheaters with which her boilers were equipped. Previous to this drastic step every other logical expedient had been resorted to with- out success, and it was, therefore, confidently believed that eliminating superheated steam from the high pressure cylinder would permit the presence of such a large quantity of condensation that piston ring wear would be overcome through water lubrication. The superheaters were removed in Europe, and the return voyage made under saturated steam, but two sets of piston rings were required as usual. This unquestionably demon- strated the fact that the loss of rings 14 FOSTER WASTE HEAT TYPE SUPERHEATER IN S. S. WEST HAVEN 4 was not caused by superheat, and prompted a thorough investigation of other conditions. The high pressure liner was drawn and a new one, cast by the Hunt-Spiller Mfg. Co., was installed. A new piston, with new Lee Cook rings, was also provided and since then the engine operation has been faultless so far as the high pressure cylinder is concerned. Thus, it was established that the specific trouble resulted from=.the use of de- fective parts produced in the war time emergency and was not a func- tion of the steam temperature. TRIPLE EXPANSION 2500. INDICATED HORSEPOWER MARINE STEAM ENGINE IN S. S. WEST HAVEN MARINE REVIEW—June, 1927