IMPROVEMENTS IN BLASTING
■» A civil engineer writing to tbe Timed states that io aotneot the fiery uUa ia the neighborhood, of tf&rosely is performed where Water iJt^BL ie addition to gunpowder, W^^^H^ poesible rerults. The proce|fctf^^>naed ia the: following, 0 tue bore-hoie in i Q^f|d^^flP^ er cartridge, with luße esfe to i^e powder cartn^JHF inserted a tubecootaioiug waterijjjfce tube should be as large >s will admit, aad flfyflipWweaienfe length, the longer th^ptftter, Tbfey may be tnada of any TCbm^nieut cheap material, . thin tin--pU^a^r of stuoc brown paper turned roa&%>ri a wooden roller and pasted to<^l||gyflm^Li closed with corks , the bor^^^^^^J»uiped, the fuse lit, and the cw^^Hbmbl' 0 ttie ÜBUa ' manner. The resuJ^Hpraia operation may be briefly autnmWup. The powder, in exploding, burß%rf.he tube con* taioing tbe water jthcMidfebglorce ot the povdar is extendo^brough the water by the well-known grinciplea of hydraulics demonstrated years ago by Brumal), over tbe enlarged area of the bore-hole, due to the «pace occupied by the water-tube- A much larger quantity of coal is thereby brought down with a smaller quantity of ponder the beat given off by tha burning of tbe powder att^ tbe glass converts a portion of the vfcter into steam, the elastic forda of w%ich assists ia the operation of blasting ; the steam and water together pat out thefl;meand fl »sh of the powder, and absorb nnd neutralise tbe greater "portiou of the gases and smoke resulting from tbe explosion.
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Inangahua Times, Volume II, Issue II, 15 December 1880, Page 2
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238IMPROVEMENTS IN BLASTING Inangahua Times, Volume II, Issue II, 15 December 1880, Page 2
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