The Catasauqua Thawing Kettle is made in one piece with an out- 

 side jacket for the hot water all around the dynamite section. The No. 1 

 size holds 30 pounds of dynamite and the No. 2 size 60 pounds. 



The water must never be heated in the Catasauqua Kettle, but mubt 

 be heated in some other vessel, and when not too hot to burn the hand, 

 poured into the water compartment provided the dynamite compartment 

 is empty. It is dangerous to heat the water in the Catasauqua Kettle 

 even when the dynamite section is empty, because there may be a little 

 nitroglycerin in it which has soaked out of the dynamite previously 

 thawed. Dynamite should not be put into the thawing kettles without 

 first carefully wiping out the dynamite compartment clean and dry. 



Do not place a thawing kettle over a fire while it contains dynamite. 



FIG. 86. CATASAUQUA THAWING KETTLE 



Du Pont Blasting Caps 



Du Pont Blasting Caps are made in several different strengths, but 

 nothing weaker than the No. 6 (red label) strength should be used, 

 because : 



They insure complete detonation. 



They increase the execution of the explosive. 



They offset to some extent deterioration, due to improper storage. 



They prevent the loss of the charge by burning. 



Blasting caps are put up in boxes of 100 and from 5 to 50 boxes are 

 packed for shipment in wooden cases. They may be exploded by shock, 

 heat or sparks, so must be kept away from fire. They are weakened by 

 moisture and therefore must be stored in a dry, cool place. 



Ill 



