For cypress, willows or stumps in very soft soil the following 

 method of blasting is recommended. Place three to six holes (according 

 to size of stump) twelve to eighteen inches away from stump between 

 lateral roots at an angle of about 75 degrees inclined towards center of 

 same (Fig. 126A). Each hole should be charged with one or more car- 

 tridges of Red Cross Extra 40% primed with electric fuze and fired 

 with blasting machine. By adopting this method, the stump will be split 

 into six or seven pieces and all roots extracted, leaving a very slight 

 indentation in ground. 



Table of Stump Charges 



The following table will enable the beginner to obtain an idea of the 

 number of Red Cross Extra 40% Dynamite cartridges required for 

 various size stumps. These figures are for old but sound stumps. Fresh, 

 green stumps will require one-half more or twice as much dynamite, and 

 partly decayed stumps less than amounts shown. After he has obtained 

 a little efficiency in doing his work he will see that he can in the majority 

 of cases considerably reduce these charges. 



Diameter of Stumps in Inches 12 l8 24 30 36 42 48 54 60 66 72 



Approximate No. of ij"x8" 



Cartridges Red Cross 1% 2 3 4 6 8 10 12 14 l8 22 



40% Extra Dynamite. 



20% Red Cross Dynamite for Stumping 



In many soils, except loose sand or swamps, it is possible to blast 

 out stumps more economically with 20% Red Cross Dynamite than with 

 the 40% strength. On the other hand in very loose or swampy soil it 

 is sometimes advantageous to use Du Pont N. G. Dynamite, 60% 

 strength. The theory is this: Sand or muck w r ill blow out much easier 

 than the stump and offers little resistance. Hence, unless there is a good 

 amount of sand or muck between the charge and the stump, the stump 

 may not be blown out. But 60% N. G. Dynamite is so fast and powerful 

 it blows the stump out before its power is lost through the sand or muck. 

 On the other hand where the soil is loam or clay it offers good resistance 

 and confines the force of 40% or 20% Red Cross Dynamite long enough 

 to ensure getting out the stump. 



131 



