 | 1840 - 644 Seiten
...the surface, if the mass exposed to the action of the explosion be of equal consistence throughout. Charges of powder, to produce similar proportionate...be as the cubes of the lines of least resistance. Thus, if 4oz. of powder would just have a given effect upon a solid piece of rock of 2 feet thick,... | |
 | Sir John Fox Burgoyne (bart.) - 1849 - 130 Seiten
...in the air. This need not necessarily be the shortest line to the surface; as, for instance, a long line in earth may, from the same charge, afford less...according to any fanciful depth of hole bored. Thus, if 4 ounces of powder would have a given effect upon a solid piece of rock of 2 feet thick to the surface,... | |
 | sir John Fox Burgoyne (bart.) - 1849 - 124 Seiten
...in the air. This need not necessarily be the shortest line to the surface ; as, for instance, a long line in earth may, from the same charge, afford less...proportionate results ought to be as the cubes of the Hues of least resistance, and not according to any fanciful depth of hole bored. Thus, if 4 ounces... | |
 | Charles Knight - 1866 - 526 Seiten
...bored as by the length of the line of least resistance, or the thickness of the rock to be blasted. Charges of powder, to produce similar proportionate...be as the cubes of the lines of least resistance. In the larger class of explosions advantage may usually be taken of fissures in the rock, to economise... | |
 | Julius George Medley - 1873 - 942 Seiten
...in the air. This need not necessarily be tbe shortest line to the surface : as for instance, a lung line in earth may, from the same charge, afford less...resistance than a shorter line in rock. Supposing the material in wliich the explosion is to take place, be of uniform consistence in every direction, charges... | |
 | J. E. Shields - 1877 - 172 Seiten
...in the air. This need not necessarily be the shortest line to the surface, as for instance, a long line in earth may from the same charge afford less resistance than a short line in rock. Supposing the matter in which the explosion is to take place to be of uniform consistence... | |
 | J. E. Shields - 2002 - 150 Seiten
...in the air. This need not necessarily be the shortest line to the surface, as for instance, a long line in earth may from the same charge afford less resistance than a short line in rock. Supposing the matter in which the explosion is to take place to be of uniform consistence... | |
 | Great Britain. Parliament. House of Commons - 1853 - 628 Seiten
...the surface, if the mass exposed to the action of the explosion be of equal consistence throughout. Charges of powder, to produce similar proportionate...be as the cubes of the lines of least resistance. Thus, if 4 oz. of powder would just have a given effect upon a solid piece of rock of 2 feet thick,... | |
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... instead of employing given weights adapted to the lines of least resistance. The line of least resistance is that line by which the explosion of the powder will find the least opposition to its vent in the air. This need not necessarily be the shortest... 