The structural and industrial materials of California (1906)
Aubury, Lewis E., b. 1862 · Sacramento, W.W. Shannon, Superintendent State printing · leaf 116
.1 7y -!^ tr ?% … o o o Ph o CO o1-4 (109) 110 STRUCTUKAL AND INDUSTRIAL MATERIA1>S OF CALIFORNIA. machines and drills are driven by compressed air. The stone is loadedby derrick on to car trucks, which convey it to tlie mill, where six gang-saws (with automatic screw feed) cut it into slabs and panels ready…
Building stones · Portland cement · Clay · Mines and mineral resources
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
