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During a cruise from Norfolk, Virginia to Key West, Florida on the USNS GILLISS measurements of electric fields between 3 cps and 10 kc were performed on two successive days. The mean signal level on the second day was 20 db higher than on the first day. The amplitude versus frequency curves obtained for the two days were also different. A possible cause for these differences was the formation of the hurricane Hilda in the Gulf of Mexico during the period of measurements (September 30, October 1, 1964). Various types of natural and man-made interference were analyzed and proposals for improvements in the measurement system are made. (Author)

Two observation stations, seperated in the East-West direction by approximately 3750 miles, the one near Munich, Germany, and the other near Kingston, R. I., USA, are being used to simultaneously observe the fluctuations of the Earth magnetic field in the frequency region around 10 cps. On 5 of 23 testdays a total of 10 cases were noted where waveforms began within 0.1 seconds of each other at both stations. (Author), Legibility of this document is in part unsatisfactory. Reproduction has been made from best available copy.

Age determinations on stone meteorites with the potassium-argon method using a newly developed technique, by H. Wanke and H. Konig Scandium 45 as spallation product of the cosmic rays in iron meteorites, by H. Wanke The potassium contents of chondrites, achon drites, and siderites, by H. Wanke