MODERN BLACKSMITHING 47 



understand things and not believe much in them 

 before we understand them. 



S WRENCH 



See Figure 6, No. 3. This wrench is for ^ nut on 

 one end and ^ on the other, just the kind for plow 

 work. To make one, take a piece of tool steel i)^ x ^, 

 start as you see in No. 4, Figure 6. Set the jaws down 

 with the fullers, punch a round hole as in end No. 4, 

 cut out from hole and finish the jaws to make the right 

 length, now bend it in S shape and finish. This makes 

 the best wrench. Do not heat over a red heat. 



ROCK DRILLS 



Few blacksmiths know how to make a rock drill. 

 Take a piece of round or octagon steel, the desired 

 length and thickness, shape it, but it must be remem- 

 bered that if during the process you ever get it over a 

 red heat there is no use to proceed, but just cut off 

 that much and start again, no hardening will prevail 

 if it is burnt. The trouble begins when you put the 

 steel into the fire, and you must watch until you have 

 it finished. When ready to harden heat it to a cherry 

 red heat, cool in water not too cold, brighten and 

 watch for temper. When it is yellow, cool it off, but 

 not entirely, take it out of the water before it is quite 



