SHARPENING SOFT CENTER STEEL SHARES 157 



To temper the share properly after it has been ham- 

 mered out requires uniform heat. The right heat is a 

 dull cherry red, a temperature of approximately 1 472 F. 

 One of the most successful methods of tempering is to 

 slowly draw the share through the fire with the cutting 

 edge down until the edge has been heated to the proper 

 color. Then draw the share from the fire, put the point 

 far enough into the ground to hold up the share, and let 

 it stay there until it cools. 



