The theory and practice of surveying. Designed for the use of surveyors and engineers generally, but especially for the use of students in engineering (1886)
Johnson, J. B. (John Butler), 1850-1902 · New York, J. Wiley & sons · leaf 342
ardthe centre, which brings particles having a slower motiontowards the middle of the surface of the stream. This inwardsurface flow is probably due to an upward flow at the sidescaused by the irregularities of the bank, which force the parti-cles of water impinging upon them in the direction of… … Fig. 78. Abbots Report. The left-hand vertical line is the axis of ref-erence, and the curves are found to fall between the seven- andeight-foot lines. That is, the velocity at all depths in thisplane was between seven and eight feet per second. In thiscase double floats were used, and it is…
Surveying
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