After E. I. du Pont de Nemours & Co. 



Fig. 162. Preparing primer for electric firing 



{a) Separate fuse wires, (b) Punch hole in end of cartridge so that it will 

 come out at the side 2 or 3 inches from the end. (c) Insert the doubled-over 

 wires of the blasting cap through this opening. (<2) Loop the wires around 

 the cartridge, (e) Punch a hole in the end of the cartridge a little to one 

 side of the first hole and in it insert the cap and take up the slack on the wires. 

 (/) Electric primer ready for firing. 



