Canadian Machinery . tool and the weight of the blowstruck? Certainly! For would not theuse of a 7 or 10-lb. hammer, on a ipunch or chisel soon ruin the tool? Itmay be shown as a ready example of thisthat while you can drive a 16-gauge 2in. wire nail into an ordinary brick untilits head is flush, if you use a 4 oz. to6 oz. hammer, yet if you use a 2 lb. .nam-mer the nail will not enter, but simplycollapse; in effect this is the same withall percussion tools. If you have a Irc-bodied chisel or punch you can use *asledge hammer on it, but if vou have asmall-bodied tool only a small hammercan be
Canadian Machinery . tool and the weight of the blowstruck? Certainly! For would not theuse of a 7 or 10-lb. hammer, on a ipunch or chisel soon ruin the tool? Itmay be shown as a ready example of thisthat while you can drive a 16-gauge 2in. wire nail into an ordinary brick untilits head is flush, if you use a 4 oz. to6 oz. hammer, yet if you use a 2 lb. .nam-mer the nail will not enter, but simplycollapse; in effect this is the same withall percussion tools. If you have a Irc-bodied chisel or punch you can use *asledge hammer on it, but if vou have asmall-bodied tool only a small hammercan be effectively used, and for theusual % in. to % in. hexagon steelpunches and chisels more work can bedone with a % lb. to 1 lb. hammer thanwith one of larger size, owing to more ofthe force being utilized. Five men were seriously burned aboutthe face and arms, when one of the em-ployees of the Pratt and Letchworth Co.,Brnntford, stepped back suddenly, strik-^ing a man carrying a ladle o-f moltenmetal. 48 Volume XXV. i. DEVELOPMENTS INSHOP EQUIPMENT
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