. The street railway review . This department is devoted to the construction and operation of electric railwaypower houses. Correspondence from practical men is specially invited. Both theusers and makers of power house appliances are expected to give their views andexperiences on subjects within the range of the The reason why it .pays to heat the feed water by hvesteam taken directly from the boiler has lately been thesubject of discussion in England. That there is an econ-omy in using live steam heaters has been shown experi-mentally and generally admitted, thfiugh fhe reason w
. The street railway review . This department is devoted to the construction and operation of electric railwaypower houses. Correspondence from practical men is specially invited. Both theusers and makers of power house appliances are expected to give their views andexperiences on subjects within the range of the The reason why it .pays to heat the feed water by hvesteam taken directly from the boiler has lately been thesubject of discussion in England. That there is an econ-omy in using live steam heaters has been shown experi-mentally and generally admitted, thfiugh fhe reason whytaking a given number of thermal units from the boilerin the steam and restoring a necessarily smallernumber of thermal units in the feed should result inan economy of lo or 20 per cent was far from Kilkardy found a gain of 10 per cent from the use ofhis heater, and in the 10 years since that time the use oflive stean; heaters has enormously increased. At the 36th meeting of the Institute of Naval Architects(English), M. Normand presented a paper in which wasshown an economy of 20 per cent by a method of heatingthe feed devised by him. He took the steam from the low-pressure cylinder of a compound engine about mid-stroke,and attributes the gain to two causes: I. The use of steamwhich has already done wor
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