. Railway master mechanic [microform] . J878 80 82 84 86 83 JO 92 94- 96 96 7900 02 04 Fig. io—Ratio of Total Heating Surface to Fire-box Hfating 7876 80 62 92 94 96 .98 7900 02 04> Fig. 14—Ratio of Tube Length to Diameter. February, 1904. RAILWAY MASTER MECHANIC 41

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