Contractors' and Dealers' Association of California · San Francisco : L. A. Larson · leaf 136
meshes perlinear inch, and at least forty (JO) butnot more than eighty-five (S5) percent, by weight will be retained on asieve having thirty (30) meshes perlinear inch. Not more than seven (7 1per cent by weight shall pass througha sieve having one hundred (10)meshes per linear inch. 50. Thestones… … pciitiont-d iis follows; One (li cubicfoot IIU pounds) of cement, two (2)cubic feet of sand, and four i4) cubicfeet of broken stone or screenedgravel, and water which shall be add-ed in such proportions as the engineermay from time to time determine. .52. If the concrete is mixed mechan-ically, a…
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