. American engineer . SolHBa,^^ y^i^ ^ / i^f- eces «5 0 2P00 4f)00 i,00O SpOO 20 40 W Fig. 9. ruw^w^ Fig I/. ~ig IZ-

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912