OCR Text |
Show Dynamite Made Safer THE use of dj namite in blasting operations during dur-ing the winter months has alwavs been at- V tended by tho inconvenience of the freezing of the explosive. This made it necessary to subject it to a thawing operation, which is all right as long as it is properly done, but the thawing out I process often results in disaster, owing to the carelessness or negligence of a workman. ditcii blasting test in snow and ico was made near Wausaukee, Wis. The ditch was blasted by the I propagated method, using a uon-freozina dvnsf mite. The dynamite was loaded through eight Inchee ol jnow and alioul one-half inch of Ice in I wet soil, the temperature of which was 33 degrees fl F. at the point of the load Moreover, the dyna- mite used had been exposed in storage to freezing temperatures lor several weeks. The resulto were entirely satisfactory Straight dynamite has been, J us. d for years n nearly every kind of open worK. M but a disadvantage has been its liability to freeze at temperatures below 50 degrees V. Any dyna- mite loses some part, if not all, of its efficacy wheu chilled or frozen and many attempts have been made to make (he explosive ow freezing |