File:Building and repairing railways (1901) (14572602619).jpg

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English:

Identifier: buildingrepairin00kirk (find matches)
Title: Building and repairing railways
Year: 1901 (1900s)
Authors: Kirkman, Marshall M. (Marshall Monroe), 1842-1921
Subjects: Railroads Railroads
Publisher: New York and Chicago, The World railway publishing company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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vation of thevalleys, and will take the elevation of spurs *from the divides, also plat the contours f of the country at difficultpoints when necessary.Where the country isunsettled and no gov-ernment survey hasbeen made, the methodwill differ somewhatfrom the foregoing. Insuch case the engineermust secure the eleva-tion and distance of thecontrolling points, whilein the former case theplats supplied him withthe distances. In addi-tion to the instrumentsspecified he will need apedometer (Fig. 10);and an odometer (Figs.11A, 11B, 11C), and agood watch. He willnot need to be providedwith instruments for determining latitude andlongitude, for the problem has already been re-duced to sections. For example, after makingthe summit of one divide, his problem is to cross *A spur is a ridge extending from a divide and separatesthe water-sheds of two branches of the same river. fThe contour of a country is Indicated by lines laid down ona map showing the location of points of the same elevation.
Text Appearing After Image:
Fig. 10. PEDOMETER.Is a pocket instrument which recordsthe distance the person carrying it haswalked. In reality it records the num-ber of steps taken, but by proper ad-justment the distance traveled is in-dicated. 54 BUILDING AND REPAIRING RAILWAYS. the next valley and reach the summit of thenext divide, using the desired grade and curva-ture. Any errors of dis-tance made from one di-vide to another will notaffect those beyond. Inmaking such surveyscamp outfits are neces-These should be asand simple as pos-If the country isand sparsely set-the engineer willprobably take two ponies,one to carry his appli-ances, and the other toride. When possible he

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Flickr tags
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  • bookid:buildingrepairin00kirk
  • bookyear:1901
  • bookdecade:1900
  • bookcentury:1900
  • bookauthor:Kirkman__Marshall_M___Marshall_Monroe___1842_1921
  • booksubject:Railroads
  • bookpublisher:New_York_and_Chicago__The_World_railway_publishing_company
  • bookcontributor:The_Library_of_Congress
  • booksponsor:The_Library_of_Congress
  • bookleafnumber:60
  • bookcollection:library_of_congress
  • bookcollection:americana
Flickr posted date
InfoField
27 July 2014

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