Show blast loosens thousands of tons of rock at devils slide three hundred thousand tons of rock was torn loose in the quarry of at the union portland cement company at devils slide last thursday afternoon by the explosion of nearly pounds of dynamite chereck the rock loosened will supply tile plant of the cement company for nearly two years R R dorland borland superintendent of the company said the blast caused no damage although it was heard for miles three hundred spectators watched at safe distances and felt the rumble of the earth as the blast lifted tile the mountain to provide the 12 powder chambers long tunnels were bored into the mountainside the chambers were all connected electrically for detonation the blast was a complete success |