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Production and employment in the portlandcement
PRODUCTION EMPLOYMENT AND PRODUCTIVITY 191938
Indexes of manhours required per unit of output
16 other sections not shown
100 barrels air separators approximately average Babcock and Wilcox ball and tube barrel of cement capacity utilization CD CD CD CM cement industry cement mill CEMENT PLANTS cement-making changes clinker CM CM CM CM CO CM H CO CO CO Company compartment mills Concrete mill sec construction conveyors costs crushers crushing drilling Dry process dust collectors economies electric factor finished cement H CM H rH Harry Jerome heat horsepower improvements increased installed kiln capacity labor productivity machinery man-hour ratio Man-hours per 100 manufacture National Research Project NRP-NBER cement-plant survey number of plants percent percentage period Portland Cement power shovels pulverizing quarry rate of operation raw materials recuperators reduced rH H rH rH rH rotary kiln sample shovels and locomotives slurry filters steam tube mills U. S. Dept unit labor requirements unit of output value of sales waste-heat boilers wet-process plants