. American railway transportation . for the service is nowbo many times what it was before the days of the railroadand other economical agencies for transportation, thatthe capital employed in transportation is far greater thanin the days of the stage-coach and the towboat. Thecheaper the service, the greater its magnitude and thelarger the amount of capital devoted to the performanceof the service. REFERENCES FOR FURTHER READING Scribners Statistical Atlas, Plates 15-17 and text page , A. T. Railroad Transportation. CHAPTEK IV THE MECHANISM OF THE RAILWAY ITS TECHNICAL GROWTH Altho
. American railway transportation . for the service is nowbo many times what it was before the days of the railroadand other economical agencies for transportation, thatthe capital employed in transportation is far greater thanin the days of the stage-coach and the towboat. Thecheaper the service, the greater its magnitude and thelarger the amount of capital devoted to the performanceof the service. REFERENCES FOR FURTHER READING Scribners Statistical Atlas, Plates 15-17 and text page , A. T. Railroad Transportation. CHAPTEK IV THE MECHANISM OF THE RAILWAY ITS TECHNICAL GROWTH Although this book is concerned with the transporta-tion service, with transportation economics, rather thanwith the technical or engineering phases of the subject,a brief account of the growth and present efficiency ofthe mechanism by which the service is now performedwill aid in the presentation of the subjects considered inthis volume. The railway machine consists of three parts:the track, the locomotive, and the car. Each had crude. Track with Wooden Stringers, burfaoed with Straps of Iron. beginnings and has reached the presenl condition ofexcellence by a Long -erics of improvements. A few onlyof the mosl important of these improvements need bereferred to in this chapter. 34 THE MECHANISM OF THE RAILWAY 35 At the beginning of railroad construction, tracks ofvarious designs were built, the chief thought of the build-ers being to secure a solid structure that would not permitthe rails to spread. In relation to the weight of the
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