Redwood and Bigtree Stumps 



The way to estimate the quantity of Hercules Powder-Stumping 

 L. F. necessary to blast out stumps larger than eight feet in diameter, 

 is to square the largest diameter in feet, the result being approximately 

 the number of pounds required. For example, if a stump is eight feet 

 in diameter the charge of Hercules Powder-Stumping L. F. should be 

 about the square of eight, or sixty-four pounds. Stumps less than eight 

 feet in diameter require a little greater charge for their size than do the 

 larger stumps, and the rule with them is to use as many pounds of 

 Hercules Powder-Stumping L. F. as eight times the largest diameter in 

 feet. On this basis a stump six feet in diameter would need about forty- 

 eight pounds of powder. However, the successful blasting of these large 

 stumps depends greatly on the judgment of the blaster, and these rules 

 can only be considered as a general guide. This can easily be understood 

 when it is remembered that, owing to difference in soil or some pecul- 

 iarity in the growth of the tree, it sometimes requires the same quantity 

 of explosives to properly bring out a stump six feet in diameter as it 

 does another one eight feet in diameter. 



In blasting these stumps a trench is dug large enough to permit 

 placing the entire charge of explosives directly underneath the center 

 'f the stump. A little powder blasted in holes punched with a crowbar 

 will prove of great assistance in digging this trench. (See Fig. 127.) 



METHOD OF PLACING HOLES FOR BLASTING 



CYPRESS, WILLOWS OR STUMPS IN VERY SOFT 



OR LOOSE SOIL 



FIG. ia6A 



135 



