McMaster, John Bach, 1852-1932, Making of America Project · New York, D. Van Nostrand · leaf 24
ion 10000 : 10472; ;21 : 22nearly. These values may also be obtainedfrom the integral calculus, in which caseno regard is taken of friction, and theformulae are therefore a little uncertain.This uncertainty, however, is on the sideof safety, for when we leave out of consideration the pressure… … Let w equal the weight per lineal footof intrados of the arch resting onthe rib. By x and y the horizontal and vertical co-ordinates respectively of the point A. By x and y the co-ordinates of D.By r the radius of the curve of intra- dos at A, andBy cc the angle it makes with the hori zon.By P the…
Bridges · Tunneling
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