Show BLASTING nocks KOCKS A very simple and effective invention for blasting rocks has haa been patented by mr D 8 sutherland of 34 great george street westminster fio fie he proposes to introduce into the borehole bore hole bole a coile colle cone either of wood or hollow metal I 1 between tho the powder and the outer side of the therole hole hoie the apex of the cone is outward and the hole is then filled up with sand sufficient clent elent room only being left br or the tile passage of the fuse the effect of this cone is that tile the force of the explosion ia Is much increased the sand rendering the tile blowing out of of the cone imps impossible ible ibie london mining journal dumb bells are the only be bells ll 11 in the world to a deaf man |