Prodromus of a practical treatise on the mathematical arts: containing directions for surveying and engineering (1838)
Eaton, Amos, 1776-1842 · Troy, N.Y., E. Gates; New York, Robinson, Pratt & co., [etc., etc.] · leaf 196
h isabout 0.88, the diameter of its base, if adjusted to the aperture, willreduce the contraction of the vein to about one sixth—that is, the 183 area of the contracted vein will be but one sixth less than that of thearea of the aperture. Also, that a gate-hole through a four-inchplank, cut a… … 184 Harbor survey; being a section of Hudson river, above TroyReferred to from sections 120 to 126. ■■■■-■■ m rW ■■ ■■ Mi -■/.mA 1 -m ||\ 9o:m
Surveying · Civil engineering
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