. Canadian machinery and metalworking (January-June 1919). that they could be reas- withOlt ono-nMn-k. The nul- were removed before the shaft was shifted, which saved labor. The three as were sufficient for each length Haft and more were not required, he entire fang on a length made ork of it. The time saved and risk avoided bv not lowering the leneths is a big item, and a similar •net11 i could be applied to many of the ons on shafting that is already in place. \N EFFICIENT HOLTBy G. D. McCarrell It is often desirable to make a smallbolt when the necessary size of stock isnot available. A con


. Canadian machinery and metalworking (January-June 1919). that they could be reas- withOlt ono-nMn-k. The nul- were removed before the shaft was shifted, which saved labor. The three as were sufficient for each length Haft and more were not required, he entire fang on a length made ork of it. The time saved and risk avoided bv not lowering the leneths is a big item, and a similar •net11 i could be applied to many of the ons on shafting that is already in place. \N EFFICIENT HOLTBy G. D. McCarrell It is often desirable to make a smallbolt when the necessary size of stock isnot available. A convenient method of accomplishing this, and one that is veryefficient, is shown in the accompanyingsketch. Obtain a piece of round stockof the required size of bolt and threadeach end as shown, the short end to takea standard nut and the long thread madeto suit the desired conditions. When thenut that serves for the head has been Do You Know That The proper blank dimension for cupwork on stamping and drawing pressesis determined either by multiplying the. METHOD OF MAKING EMERGENCY BOLT screwed on the end is welded with ancxy-acetylene torch, the result being avery satisfactory bolt. BOOK REVIEW .Mechanical Drawing by Eivin Ken- ison and Edward D. Waite, the American Technical Society, Chicago The work of the accomplished engineeror designing draftsman is somethingwhich demands broad acquaintance withengineering and necessitates consider-able ability and inventive skill. Thesame men who show such skill have hadto acquire it through careful and pains-taking study and practice of the rudi-ments of mechanical drawing. They hadfirst to lay their foundation for the moreadvanced work along this line of equip-ment necessary for drawing of variouskinds and how to use it. All of tneseimportant features are carefully treatedof in this work. The studies are illus-trated by diagrams and plates, andcribe for students the simplest drawingproblems to those which in difficulty ap-proach more o


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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmachinery, bookyear19