This letter will describe the Results from the third rocket in a series carrying payloads designed to measure small fluxes of soft x-rays are described. The rocket, and Aerobee 150, was launched successfully from White Sands Missile Range during the evening of 13 October 1962 and reached a peak altitude of 145 miles. Three thin window Geiger counters were included in the payload two utilized mica windows, and the third used 0.002 beryllium. The two mica window counters showed evidence of breakdown and electric malfunction. Only the data from the beryllium window Geiger counter are therefore reported.