FREE BOOKS

Author's List




PREV.   NEXT  
|<   132   133   134   135   136   137   138   139   140   141   142   143   144   145   146   147   148   149   150   151   152   153   154   155   156  
157   158   159   160   161   162   163   164   165   166   167   168   169   170   171   172   173   174   175   176   177   178   179   180   181   >>   >|  
exciting and interesting part of clearing land by modern methods. The dynamite is put up in half-pound sticks. They are a little larger than an ordinary candle and are wrapped in heavy yellow paraffined paper. One folded end of this paper is opened up and a hole made by a wooden skewer into the dynamite stick, which is plastic and resembles graham bread in color and consistency. For magneto-battery work where several charges are required, a copper cap in which is a minute quantity of fulminate of mercury, and which is exploded by a spark, is attached to fine electric wires and sealed by sulphur. This cap is placed in holes in the sticks of dynamite, and then securely tied by drawing string tightly around the paper which is raised to admit the cap. In preparing a charge for fuse ignition, the cap is crimped to the end of a piece of mining fuse and this is inserted in the dynamite stick and securely fastened as previously described. These prepared charges are placed in a basket and carried very tenderly to the stumps which have been prepared by the dynamiter's assistant. All the work is handled very carefully, for while there is not much danger of an accident unless fire is placed near the explosive, nevertheless extreme caution is used at all times. It requires a nature serene, calm, and deliberate. Deep oblique holes were then made with a round crowbar under the stump singled out for execution. This hole should be as nearly horizontal as possible and directly under the stump so that all the explosive force may be expended on the wood and not on the earth between the dynamite and the stump. The earth acts as a cushion and the natural tendency of dynamite to exert force downward is counteracted. As soon as a small strip was blown, the Italians, gathering up all the stumps, roots, and fragments, removing any pieces that were loosened but not completely torn out, and piling them at intervals, immediately burned them. This cannot be done when stumps are removed by any other method, for by the digging process the earth must be picked and scraped from them and ultimately the stump hacked in pieces before it will burn. By our method the stump is burned and the finest kind of unleached wood ashes--containing lime to "sweeten" and potash and phosphoric acid to furnish plant food--are spread upon the ground a few hours after the stumps are blown out. These ashes would under other circumstances have to be purchase
PREV.   NEXT  
|<   132   133   134   135   136   137   138   139   140   141   142   143   144   145   146   147   148   149   150   151   152   153   154   155   156  
157   158   159   160   161   162   163   164   165   166   167   168   169   170   171   172   173   174   175   176   177   178   179   180   181   >>   >|  



Top keywords:

dynamite

 

stumps

 

method

 

burned

 

pieces

 

securely

 

prepared

 

charges

 

explosive

 

sticks


crowbar
 

oblique

 

expended

 
counteracted
 
singled
 
horizontal
 

directly

 
cushion
 

execution

 

natural


tendency

 

downward

 

intervals

 

sweeten

 

potash

 

phosphoric

 

unleached

 

finest

 

furnish

 

circumstances


purchase
 
ground
 
spread
 

completely

 

piling

 

deliberate

 

immediately

 

loosened

 
gathering
 
fragments

removing

 

scraped

 
ultimately
 

hacked

 
picked
 

removed

 
digging
 

process

 

Italians

 
consistency