Federal employment opportunities for physicists for work in following fields of physics, electronics, combustion and flame, mathematical, explosives, jet propulsion, spectroscopy; chemical engineers for work in following fields of chemical engineering, explosives and explosions, jet propulsion; mathematicians for work in following fields of mathematics, numerical analysis, applied mathematics; chemists for work in organic chemistry and in following fields of physical chemistry, kinetics, combustion and flame, spectroscopy, explosives, jet propulsion, $4,600 to $7,600 a year (grades GS-9 to GS-13), for duty at Central Experiment Station, Bureau of Mines, Pittsburgh, Fa., or Bruceton, Pa., announcement 3-35-1 (1951).

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