Elevation and stadia tables: For obtaining differences of altitude for all angles and distances; horizontal distances in stadia work, etc., with all necessary corrections. Together with hydraulic tables, giving velocities for various channels and slopes

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J. Wiley & sons, 1901 - Technology & Engineering - 42 pages
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Page 6 - For obtaining differences of altitude for any minute up to 15 degrees, and for any distancc. [Prepared by Arthur P. Davis.] EXPLANATION OF TABLE. The left-hand column is the minutes of the vertical angle, the degrees being denoted by the large number at top of page. The boldface figures at top of column is the distance in miles. Numbers in the body of the table denote the difference of elevation corresponding to the angle on the left and the distance at top. The correction for curvature, refraction,...
Page 6 - On page 253 the tabular number corresponding to 9 18' and — Feet. A distance of 3 miles is 2, 594 For a distance of 6 miles is 5, 188 — for 0.6 is therefore 519 For a distance of 2 miles is 1,729 — for 0.02 is therefore 17 For a distance of 8 miles is 6,917 — for 0.008 is therefore 7 Correction for curvature, refraction, and height of instrument for 3.6 miles is + . 12 Total difference of altitude + 3, 149 TABLE 26.
Page 41 - Canals In earth in average condition, free from stones and weeds. Rivers above the average in regimen, alignment, and uniformity of cross-section and slope, and free from detritus.

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