Manual for railroad engineers and engineering students : containing the rules and tables needed for the location, construction, and equipment of railroads as built in the United States (1883)
Vose, George L. (George Leonard), 1831-1910 · Boston : Lee and Shepard · leaf 94
t monuments placed upon prominent points.On account of gases and heated vapors, which rise from the shafts,and mix irregularly with the outside air, there is always more orless atmospheric disturbance, and consequent variation in the posi-tion of the centre line as determined by the transit at… … ^ \ xo
Railroad engineering
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