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 346
s; C the coefificient to reduce these to the mean velocityin a vertical plane; Ay^ A^, A^, etc., the partial areas of the cross-sectioncorresponding to the observed velocities V^, F,,F3, etc.; A the total area of the cross-section = A^^ A^-{- A^yetc.; Qv Qii 03 ^tc, the partial discharges; Q the… … Fig. 8q, 3l6 SURVEYING. It has been here assumed that observations are made at butone point in any vertical plane. The method is the same, how-ever, in any case, it only being necessary to apply such a co-efficient to the observed velocity as will reduce it to the meanvelocity in its own sub-area.…
Surveying
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