300 



AGRICULTURE 



Place finger on vent hole, hold cap in place, and run the 

 brush around the solder-hemmed cap evenly, with light 

 stroke of the hand. Do this with all cans ready to be 

 capped. Then take capping iron from the fire. Insert the 

 upright steel in center. Hold capping iron above cap until 

 center rod touches cap and holds it in place. (See page 

 298.) Then bring cap down in contact with all four points 



D - 



(A) Self-heating capping iron. (B) Flux jar and brush. (C) 

 Solder-hemmed cap. (D) Ammonia bar for cleaning irons. 

 (E) Wire solder. (F) Tipping copper and method of applica- 

 tion. 



of solder-hemmed cap and rotate back and forth about three 

 strokes. Do not bear down on tipping iron. A forward and 

 back stroke of this kind, if properly applied, will perfectly 

 solder the cap in place. Remove capping iron and inspect 

 the joint. 



If any pinholes are found, repair or recap. It may be 

 necessary to use a piece of wire holder or a waste solder 



