Elements of surveying and levelling; with descriptions of the instruments and the necessary tables (1870)
Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes & Company · leaf 208
where long lines of profile,with a gentle slope, are to be plotted, as is always the casein the trial section of a railroad suryey. We shall illustratethe manner of plotting a profile section, by drawing the sectiondetermined by the field-notes just given. 20. Draw a horizontal line AK, called a… … distances 650, 700, 750, &c., feet to K, using in this case a scaleof 1500 feet to 1 inch. At the points B, C, D, E, &c., thusdetermined, erect perpendiculars, making them equal, on a scaleof 25 feet to the inch, to the corresponding difierences of leveltaken from the field-book; through…
Surveying
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