18 MANUAL FOR ARMY HORSESHOERS. 



metal closely, and when the part to be welded has a bubbling 

 (fluxing) appearance it must be withdrawn from the fire and 

 worked immediately. The success of a weld depends entirely 

 upon the proper heat of the parts at the exact moment the weld 

 is attempted, 



A newly made coal fire can be used for ordinary heating, but 

 for a welding heat coke is required. Coke is ordinary coal from 

 which the gases have been driven off by gradual heating. It will 

 be found ready at hand around the edge of the fire. As coke doeo 

 not smoke, there is no trouble in observing when the metal has 

 reached exact welding heat. 



