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  • : Manufacturing Process of Dynamite including historic methods
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    • Dynamite manufacture

    • Manufacturing Process of Dynamite including historic methods
    • Tunnel leads into one of the ten mound shaped buildings which form manufacturing area at DuPont's dynamite plant near Martinsburg, West Virginia. Concrete walls are twice as thick as foundation of well built home. Air conditioning is new feature of...
    • Repauno Plant

    • Manufacturing Process of Dynamite including historic methods
    • For safety in handling dynamite, wooden machinery and tools even to the shovel, must be used. Here an operator is filling a powder jitney with the explosives in the mix house at the Repauno, New Jersey plant of the DuPont Company.
    • Repauno Plant

    • Manufacturing Process of Dynamite including historic methods
    • Dynamite resembles white flour at this stage of manufacture. Here it is being dumped from the powder jitney into a hopper for further processing.
    • Dynamite ingredients

    • Manufacturing Process of Dynamite including historic methods
    • Dynamite ingredients are carefully weighed and mixed for the powder lines in the dope house at the Repauno, New Jersey plant of the DuPont Company. Operator is dumping ammonium nitrate into a bin mounted on scales.
    • Dynamite packing

    • Manufacturing Process of Dynamite including historic methods
    • Dynamite is shoveled into the hopper of a gelatin cartridge machine which packs the explosive into a heavy paper tube, closes the tube ends, and ejects the finished cartridge at the Repauno, New Jersey plant of the DuPont Company.
    • Nitrating House

    • Manufacturing Process of Dynamite including historic methods
    • The nitrating house where dynamite is processed at the Repauno, New Jersey plant of the DuPont Company resembles a fort. Overhead pipes carry steam from the powerhouse.
    • Acid area

    • Manufacturing Process of Dynamite including historic methods
    • Dynamite products starts at the acid area in the Repauno, New Jersey plant of the DuPont Company, where operator is shown hoeing finely ground sodium nitrate, an essential raw material, into the endless chain loader.
    • Safe handling

    • Manufacturing Process of Dynamite including historic methods
    • For safety in handling dynamite, wooden machinery and tools even to the shovel, must be used. Here an operator is filling a powder jitney with the explosives in the mix house at the Repauno, New Jersey plant of the DuPont Company.
    • Conveyors

    • Manufacturing Process of Dynamite including historic methods
    • Aluminum covered conveyors snake across landscape, adding another weird touch to the Explosives Departments dynamite plant near Martinsburg, West Virginia. By eliminating old style powder buggies, conveyors reduce handling and speed the manufacture.
    • Conveyors

    • Manufacturing Process of Dynamite including historic methods
    • Into one end of the modern DuPont dynamite plant flow nitric acid, glycerin and other basic ingredients of dynamite. Each of four key steps in manufacture is carried out in a different mound, connected by specially designed conveyors like the one...
    • Dynamite Mixing House

    • Manufacturing Process of Dynamite including historic methods
    • This is an Atlas mixing machine, used in the manufacture of dynamite at Repauno about 1895. The box in the foreground contains inert ingredients which are placed in the trough. Nitroglycerin is added from the containers shown on the cart at the...
    • Transfer shed

    • Manufacturing Process of Dynamite including historic methods
    • Boxes of dynamite roll into transfer shed at end of dynamite production line at DuPont's Potomac River Works, Martinsburg, West Virginia. Hydraulic motors on powder machinery, automatic feeding and packing of paper cartridges are but a few of the...
    • Making nitroglycerin

    • Manufacturing Process of Dynamite including historic methods
    • Nitroglycerin is made in nitrating house by mixing glycerin with nitric and sulfuric acids. This is most critical operation in explosives plant; equipment enables operator to drown an entire charge in water, if necessary.
    • Weighing ingredients

    • Manufacturing Process of Dynamite including historic methods
    • Dynamite ingredients are carefully weighed and mixed for the powder lines in the dope house at the Repauno, New Jersey plant of the DuPont Company. Operator is dumping ammonium nitrate into a bin mounted on scales.
    • Dynamite containers

    • Manufacturing Process of Dynamite including historic methods
    • Dynamite containers are made of paper rolled into tubes, which are sprayed with paraffin for moisture protection. Here operator pulls cart from tunnel and drains off excess paraffin.
    • Transfer of dynamite

    • Manufacturing Process of Dynamite including historic methods
    • Dynamite is transferred to magazine area in small, narrow gauge freight cars. After loading is complete, the brakeman hooks a dummy car between engine and full car for safety.

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