. American engineer . ses it is advisable to have the arch tightagainst the throat sheet although instances were mentioned whereit was desired to keep a heavier fire and several of the brickson the lower rows were omitted. Very little difficulty was re-ported in connection with the arch tubes failing although thenecessity of seeing that these tubes are properly cleaned andkept clean was generally admitted. The value of the arch as asafety device in case of a burst boiler tube was mentioned. Onthe Lake Shore & Michigan Southern there has been but onearch tube failure in three years and three mo
. American engineer . ses it is advisable to have the arch tightagainst the throat sheet although instances were mentioned whereit was desired to keep a heavier fire and several of the brickson the lower rows were omitted. Very little difficulty was re-ported in connection with the arch tubes failing although thenecessity of seeing that these tubes are properly cleaned andkept clean was generally admitted. The value of the arch as asafety device in case of a burst boiler tube was mentioned. Onthe Lake Shore & Michigan Southern there has been but onearch tube failure in three years and three months service. Asa general thing the engineers and firemen were found to stronglyfavor the use of the arch. The discussion was expanded to include firing methods. Ex-amples of where a very heavy and thick fire had proven success-ful from every standpoint was mentioned but it finally appearedthat the almost universal sentiment of the members was in favorof light and level firing with a light body of fire in the Rectangular Nozzle on the Central of Georgia. Comparative tests of both schemes were mentioned by some ofthe members, in each case showing that the light fire and lightfeeding were by far the most economical. Mr. Gaines stated that when first starting his design of loco-motive furnace he had the idea of obtaining a large fireboxvolume. This, however, he discovered after longer experience,was not the proper idea and what was really needed is a longflame way. In this connection Mr. Gaines used a most ex-pressive term, vis., conversational heating surface, meaningthat it is by no means the total amount of heating surface thatindicates the capacity of a boiler but its proper arrangement andnot infrequently a boiler which has a larger amount of surfaceis by no means as good a steam producer as one with muchless surface properly arranged. JIR. M.\Ca.\INs .\DDRESS. D. R. MacBain. superintendent of motive power. Lake Shore& Michigan Southern, spoke in part as follows: There
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
