Periodicals; Chemical industry; Explosives; Dynamite;
Table of Contents: DuPont Gelatin Blasts Tunnels Under the Mississippi; Dynamite Extinguishes Mine Fire; The Blast Heard 'Round the World; Practical Explosives' Efficiency; DuPont Blasting Gelatin Not Low Freezing; Foresight and Hindsight; Lighting...
Periodicals; Chemical industry; Explosives; Dynamite;
Table of Contents: Conservation; Excavating Lake Washington Canal; Dependability; Smokeless Bananas; Ballistite Unhurt by Three Months' Immersion; Practical Explosives Efficiency; Two or More Electric Blasting Caps in a Bore Hole; Depth of Charges...
Hailed as a styling masterpiece virtually from the moment it was introduced on October 2, 1939 the Lincoln Continental was distinctive offshoot of the Lincoln Zephyr series, developed under the leadership of Edsel Ford. It was in effect eh Mark I,...
Machining-further transforms the propeller so that by the time its ready to ship it weighs 22,000 pounds. Tolerances must be infinitely close in width and pitch. It must also go through a fine balancing operation. Cramp Brass craftsmen check also...
Written on back of image: "Experimental crimpers, filament, large size. Built 1-2, 1952. Photographed March 17, 1952. These units have a common drive, 1/3 H.P. motor. Left Unit: rolls 4 1/2" diameter x 1/4" face; saddle shown is for internal work...
Written on back of image: "Jelly Roll stock feed - primarily intended for hogs hair, short, unmatted fibers. Rebuilt with 8" diameter rolls in place of the 4 1/2". Large diameter bore bottom saddle Jelly Roll dumps directly into the unit. Built...
Caption: "THis miner is using a Pneumatic Drill to bore into the face of the coal. Powder charges are place in the holes and exploded, breaking the coal into lumps for transportation to the surface. The miner's safety lamp is hung on a nail above...
Text from back of image: "Five persons were killed and five seriously injured when this Pan-American Grace airliner San Pedro, plunged into the shallow waters of Lake Mar Chiquita, in the Argentine republic recently. By a strange coincidence the...
