. Engineering and Contracting. June f JunI, Jun r MayS-drill t May •06•06•06?06 •07•07 •07•07 54545254 5658 6060 ,Hackensack, , , X. s. *> J ]\Iarch 9. 1910. ENGINEERING-CONTRACTING 215 An Ajax drill sharpener was used, andproved very satisfactory. Rubber and cottonhose, covered with woven m

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. Engineering and Contracting. June f JunI, Jun r MayS-drill t May •06•06•06?06 •07•07 •07•07 54545254 5658 6060 ,Hackensack, , , X. s. *> J ]\Iarch 9. 1910. ENGINEERING-CONTRACTING 215 An Ajax drill sharpener was used, andproved very satisfactory. Rubber and cottonhose, covered with woven marlin. was usedfor the bench (3 ins. inside diameter, in 50-ft. lengths), for, drills (1 in. in diameter, in25-ft. lengths), and for steam shovels (2% Neat Line Drilling Data.—During the progress of thework, both general and detailed observationswere made of the drilling, the results ofwhich are shown in the tables. Table I hasbeen compiled from the records as platteddaily on the chart from the inspectors re-.

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