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Excerpt from Tables Showing Difference of Level in Feet, Corresponding to a Given Angle When the Distance Is Read in Metres or Feet, and for Horizontal Reductions, for Use With StadiaWhen distances are read in feet they may be reduced to metres by Table V, on page 65, and the required quantities may be taken from the tables as before.Table IV gives correction for curvature and refraction. When the angle is plus the correction should be added, ...
Excerpt from Tables Showing Difference of Level in Feet, Corresponding to a Given Angle When the Distance Is Read in Metres or Feet, and for Horizontal Reductions, for Use With StadiaWhen distances are read in feet they may be reduced to metres by Table V, on page 65, and the required quantities may be taken from the tables as before.Table IV gives correction for curvature and refraction. When the angle is plus the correction should be added, ...