The switch is thrown on the DuPont Condenser Discharge Blasting Machine and all 900 holes are fired at once. This machine, which builds up enough voltage to set off as many as 1200 holes at one time, removed the need for power lines or portable...
Periodicals; Chemical industry; Explosives; Dynamite; Plastics industry; Ammunition; Quarrying; Blasting;
Table of Contents: The new president; If I would find a dynamite cap; Pyralin in the shoe industry; DuPont products to the millions; Trapshooting, an ideal sport; Italian firm wins Fabrikoid cup; Interior finishing with Duco; Mound builders worked...
Table of Contents: Gunpowder was scarce in Washington's day; Packages for better selling; The prized pearls of industry; Rayon fabrics, a forecast; West Virginia's greatest tunnel project; The exploding wedge; New Fabrikoid effects and grains for...
Well broken rock was the objective, and the result was what drillers call maximum fragmentation with minimum back break. Along the turnpike the crack and rumbling of blasting has given way to the drone of traffic.
Dynamite is brought up to the face after round has been drilled. DuPont's Special Gelatin 40% strength is widely used in all types of underground blasting.
