Table of Charges and Amount of Red Cross Extra Dynamite 

 Required per Acre for Orchard Rejuvenation 



Blasting Ice 



Ice gorges may often be prevented by shattering the large floating 

 cakes with Red Cross Extra Dynamite 40% so that they will not lodge 

 at dams or in the narrow parts of the stream. To break these cakes 

 several cartridges of the dynamite tied together in a bundle are laid on 

 the ice and exploded. This is repeated until the cake is thoroughly 

 shattered and broken up. The size of the charge and the number of times 

 the blasting must be repeated depend altogether on the thickness of the 

 ice and the size of the cake. One cartridge of the bundle is primed with 

 blasting cap and fuse, but before this the dynamite must be thoroughly 

 thawed and kept thawed until it is laid on the ice. This blasting can be 

 done best along broad, slow-moving parts of the stream where it is easy 

 to get on to the ice cakes either from the shore or from boats. When the 

 streams are narrow the charges of dynamite may be thrown on to the ice 

 from the shores, or, if the ice is running swiftly, they may be dropped on 

 to the cakes from the downstream side of bridges. When the charges 

 consisting of two or more cartridges tied together in a bundle are to be 

 thrown on to the floating ice either from bridges or the shore a block of 

 wood, piece of board or something of that kind should be tied to the 

 charge to keep it from rolling out of position after it lands on the ice. 

 As it is necessary when blasting ice in this way to light the fuse while 

 the dynamite is in the hands of the blaster, particular attention must 

 be given to having the fuse plenty long enough and the charge must be 

 thrown just as soon as the fuse is lighted. 



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