ii8 MODERN BLACKSMITHING 



about one inch up, let the temper return to half an 

 inch from the face, that is, draw the temper as much 

 as you can without changing the temper at the face. 

 There it should be as hard as you can make it. When 

 heating the peen end keep a wet rag over the face to 

 prevent it from becoming hot. This end should not be 

 tempered quite as hard as the face. 



HOW TO DRILL CHILLED CAST IRON 



Chilled cast iron can be easily drilled if properly 

 annealed, but it cannot be annealed simply by heating 

 and slowly cooling. Heat the iron to a red heat and 

 place it over the anvil in a level position ; place a piece 

 of brimstone just where the hole is to be drilled, and 

 let it soak in. If it is a thick article place a piece on 

 each side over the hole, as it will better penetrate and 

 soften the iron. Next, heat it again until red, then 

 bury it in the cinders, and let it cool slowly. To heat 

 and anneal chilled iron is of no avail unless it is allowed 

 to remain hot for hours. Chilled iron will, if heated 

 and allowed to cool quick, retain its hardness. The 

 only way to anneal is to let it remain in the fire for 

 hours. Brimstone will help considerably, but even 

 with that it is best to let cool as slowly as your time 

 will admit. 



HOW TO DRILL HARD STEEL 



First, make your drill of good steel, oval in form, 

 and a little heavier than usual on point, and temper as 



