. American engineer and railroad journal . ^ Durafion ofresf/nMours. TimB(PM{ Diagrams Showing Results of Experimental Apparatus Used in Making Comparison. ferred to; the latter for infoi-mation of your committee only?There were twenty replies to this; nine showing lagging costsfrom 21 to 29 cents per square foot applied, eleven stating thatit cost from 7 to cents per square foot, according to thick-ness. Two roads replied that they lagged both sides and headsof boilers; four that they lagged the sides only; three that theylagged the heads of certain engines, with large boiler hea
. American engineer and railroad journal . ^ Durafion ofresf/nMours. TimB(PM{ Diagrams Showing Results of Experimental Apparatus Used in Making Comparison. ferred to; the latter for infoi-mation of your committee only?There were twenty replies to this; nine showing lagging costsfrom 21 to 29 cents per square foot applied, eleven stating thatit cost from 7 to cents per square foot, according to thick-ness. Two roads replied that they lagged both sides and headsof boilers; four that they lagged the sides only; three that theylagged the heads of certain engines, with large boiler heads ac-count of excessive heat in the cabs. Nineteen replied that theyhad no experience whatever in lagging cylinders and steamchests. Of the fifteen that had some experience, six used wood,one filled all spaces around casings and coverings with hairfelt, eight used different kinds of insulation. Samples were furnished! by the manufacturers, with the ex-ception of the wood, and in addition to these samples the com-mittee took from store stock additional samples of each kind,which were tested along with those
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
