. Canadian machinery and metalworking (January-June 1919). Die Head Cuts Perfect Threads The H. & G. Die Head illustrated is only 3% outsidediameter, yet it will cut from the smallest up to 1standa d thread and up to lVs fine threads. Forabsolute proof of its ability to stand up and givegood results, see the perfect threads it cuts onnickel steel. You can see these many places, but inalmost any automobile oraeroplane plant for cer-tainty. Made in 9/16, 1, 1%° and2 sizes. No stronger, more durable,more accurate Die Headwas ever made. Ask for Catalog Eastern MachineScrew Corp. Conn on Nickel. W.

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. Canadian machinery and metalworking (January-June 1919). Die Head Cuts Perfect Threads The H. & G. Die Head illustrated is only 3% outsidediameter, yet it will cut from the smallest up to 1standa d thread and up to lVs fine threads. Forabsolute proof of its ability to stand up and givegood results, see the perfect threads it cuts onnickel steel. You can see these many places, but inalmost any automobile oraeroplane plant for cer-tainty. Made in 9/16, 1, 1%° and2 sizes. No stronger, more durable,more accurate Die Headwas ever made. Ask for Catalog Eastern MachineScrew Corp. Conn on Nickel. W. D. ANDERSONS ENGINEERINGEFFICIENCY SERVICE Graphic ProductionControl is a modern departure from obsoletemanufacturing principles. It is the oneand only system which insures maxi-mum output ALL THE TIMEIt actually controls by putting every-body in the plant on are practical men and experts inthis field. Why not have the best system in theworld? Its easy to us write you about it. 380 Queen St. West, Toronto, Canada 76 C A X A I) I A K M A C II INERY Volume XXI

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmachinery, bookyear19