Betterment briefs : a collection of published papers on organized industrial efficiency (1909)
Jacobs, Henry William, 1874- · New York : John Wiley · leaf 137
FIG. 76—THE FIRST IMPROVEMENT MADE IN THE BORING MILL. CAST-IRONHOUSINGS WITH ADJUSTING SCREWS TOOK THE PLACE OF THE OLD WOODEN BLOCKSFOR HOLDING THE BUSHINGS. 126 Betterment Briefs. … FIG. 77—THE HOUSINGS WERE RE-DESIGNED AS SHOWN, AFTER THE INTRO-DUCTION OF HIGH-SPEED TOOLS, IN ORDER TO OBTAIN SUFFICIENT STRENGTH ANDRIGIDITY TO WITHSTAND THE HEAVIER CUTS.
Railroads -- Equipment and supplies · Locomotives -- Maintenance and repair · Railroads -- Repair-shops
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