EXPLOSIVES 187 



not sensitive to blows but is peculiarly sensitive to friction 

 and should not be cut or broken. 



PRECAUTIONS 



1. Do not go near the charge for at least one-half hour 

 if it fails to explode. 



2. Do not dig out a misfire. 



3. Use only a hardwood tamper. 



4. Handle caps carefully. Do not drop them or lay them 

 on the ground where they may be stepped on. 



5. Do not use frozen dynamite. 



6. Handle the sticks carefully, for when the cover is torn 

 the dynamite is exposed to the moisture in the air. 



7. Do not drop or throw dynamite. 



8. Do not leave dynamite or caps exposed to the rays 

 of the sun. 



9. Store dynamite so that the sticks lie on the side, pre- 

 venting dangerous concentration of nitroglycerin in the 

 lower end. 



10. Do not keep "or carry caps with dynamite. 



11. In crimping, great care must be exercised not to 

 pinch the part of the cap containing the fulminate of mer- 

 cury. There is sufficient explosive in the cap to injure a 

 hand seriously. Never crimp with the teeth. 



12. Do not tamp hard when near the charge. 



13. To avoid headaches, do not inhale the fumes from a 

 recent explosion and do not handle the dynamite without 

 gloves. 



14. See that all sticks in one hole are in contact. 



15. Keep the dynamite and caps out of reach of stock. 

 Cattle like the taste of dynamite because of the salty ingre- 

 dient, but a very little proves fatal. 



16. In electric blasting always make wire connections 

 from the charge toward the machine, attaching the wires 

 to the binding posts only when all persons are at a safe 

 distance. 



