The structural and industrial materials of California (1906)
Aubury, Lewis E., b. 1862 · Sacramento, W.W. Shannon, Superintendent State printing · leaf 292
ough the mass. The l)etter grades of the gypsum now being (juarried, it is stated, runover 80 per cent in calcium sulphate. The workable beds vary in thick-ness from 2 to 30 feet or more. The present quarry (July, 1904) con-tains from 4 to 5 feet of commercial product, with almost no stripping.All… … II.I.. -No. 122. (.VPSUM IJUARRY OF THE ALPLXE PLASTER COMPANY AT P.VLMHALE,LOS ANGELES COUNTY. Light bands are gypsum. of ])laster—No. 1, white for finishing; and No. 2, wall plaster. TheI)roduct is principally used in Los Angeles and Pasadena, and thedemand is stated to be steadily increasing.…
Building stones · Portland cement · Clay · Mines and mineral resources
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
