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THK tWKMKRS HANDBOOK. 



Scarfing is done usually with the pent' of the hammer. Generally it can be 

 done by the smith, but, to secure exactitude, it is necessary in some cases for 

 the smith to hold the pene in position while the helper strikes with the sledge. 

 It is done whilst the iron is just at a yellow heat, and before the pieces are 

 returned to the fire for the final welding heat,' they should be carefully fitted 

 so that they are in close contact with each other. Tf this is not done, welding 

 cannot be proceeded with at once, and the lost time results in defective 

 work. 



Fig. 9.— Lap Weld. 



Different kinds of Welds. 



Fig. 9 shows one of the best methods of scarfing when simple straight 

 bars are to be welded. A weld scarfed thus, is made by hammering directly 

 downwards as shown by the arrows, and there is no danger of the two 



Fig. 10 —Link or Ring Weld. 



