i8o 



ENGINEERING ON THE FARM 







a 



;3@$0 : i#& ■ 



d 



After E I. du Pont do Nemours & Co. 



Fig. 160. 'Preparing primer j or safety-fuse firing when 



drill hole is small 



(a) Cut off sufficient length of the fuse. (&) Take one cap from the box with 

 the fingers, (c) Place cap on end of fuse, (d) Crimp cap to fuse with cap 

 crimper, (e) Punch a hole in end of cartridge with handle of cap crimper. 

 (/) Tie cord around cartridge, (g) Tie cord around fuse. 



