New terrestrial heat flow values from Hungary

Summary Temperature and conductivity measurements show, that in the Southern part of Transdanubia (the part of Hungary which lies Westwards from Danube) the heat flow is about 2–2.4·10^–6 cal/cm² sec. Eastward from the Danube, in the Hungarian Plain estimates are even higher, and vary between 2.3·10^–6 and 2.8·10^–6 cgs. The gradient of temperature is everywhere quite high, 5.0 resp. 5.8·10^–4 deg. C/cm on the average. Thus, at a depth of 1000 m, the virgin rock temperature is about 60–70 deg. C, at 2000 m about 110–130 deg. C.     

Vergleich luftelektrischer Messungen mit der Kondensationskernzahl auf Jungfraujoch (3578 m. ü. M.)

Zusammenfassung Es wird zum ersten Male ein Vergleich luftelektrischer Elemente in kernarmer Luft von etwa 50–1000 [KK/cm³] durchgeführt. Es zeigt sich, dass auch in diesem Bereich der Kernkonzentration die vereinfachte Wiedervereinigungsgleichung noch ihre Gültigkeit hat. Die Streuung der einzelnen Werte ist sehr gross. Die Gründe dieser Streuungen werden kurz erwähnt. Die Lösung der Wiedervereinigungsgleichung wird für den Fall kleiner Kernkonzentrationen in eine e-Funktion entwickelt. Eine genaue Aussage über den Absolutwert der Leifähigkeit kann auf Grund dieser Gleichung nicht gemacht werden. Diese Gleichung gibt über die Beziehung der Leitfähigkeitsänderung und der Kernzahländerungd/dZ=– Auskunft. Einige Tagesgänge der Monatsmittelwerte werden demonstriert.

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Summary For the first time comparisons are made in an atmosphere with a small number of condensation nuclei, between the content of condensation nuclei and atmospheric electrical elements. The simplified equation for the recombination is valid in this range of nuclei content too. The dispersion of single values is very great. The causes for this dispersions are briefly mentioned. The solution of the equation of recombination is evolved into an exponential function for the case of small nuclei content. An exact statement for the absolute value of conductivity cannot be given on the basis of this equation. This equation provides information on the relations of variations of conductivity and numbers of nuclei:d/dZ=–. Some diurnal variations of the monthly means are demonstrated.

     

Production of atmospheric condensation nuclei by solar radiation

Summary Air with a very low count of atmospheric condensation nuclei was irradiated by direct sunlight through an uviol glass window, or through ordinary glass or in a polyethylene balloon. The nucleus count rises immediately and reaches very high values.

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Zusammenfassung Luft mit sehr niedriger Zahl von atmosphärischen Kondensations-Kernen wurde mit direktem Sonnenlicht bestrahlt, entweder durch ein UV Glas oder durch gewöhnliches Glas oder durch einen Polyethylen-Ballon. Die Zahl der atmosphärischen Kondensations-Kerne steigt sogleich und erreicht sehr hohe Werte.

     

Seismic equipment for the investigation of microtremors

Studia Geophysica et Geodaetica - В настоящей статье...     

Sensitivity of the Gs 12 gravity meter to vibrations

nuaa m¶rt;ua u mam unmauaumaGs 12 No. 129 a uauu ¶rt;uana amm 0.02–30. a uu a uau nam auu au u auma naamauma a mua ma u n¶rt;a mumm a ¶rt;uu ¶rt;ama ammau uu .     

A palaeomagnetic and petromagnetic study of Upper-Carboniferous,Permian and Triassic sediments,NW Bulgaria

Summary In order to obtain basic palaeomagnetic data on Upper Carboniferous, Permian and Triassic sediments collected from the NW Bulgaria, laboratory stability tests were extended from A.C. and thermal treatments to studies of mineral phase changes and to investigations of changes of magnetic anisotropy during laboratory procedures. Laboratory criteria were found which permitted to distinguish samples suitable for palaeomagnetic analyses from those representing rocks totally or almost totally chemically reworked during their history. Palaeomagnetic directions and pole positions derived from Stephanian, Lower Permian and Triassic rocks from the southern margin of the Moesian Platform are compatible with the values obtained for the tectonically stable North-European Platform.     

The permeability controlled accumulation of primary magma

The initial accumulation of primary magma occurs just after the mantle has become permeable. The accumulation is caused by the compaction of the residuum, which either may be controlled by the rate of creep, or by the rate of flow of the interstitial melt. Experimental results suggest that the rate of compaction is controlled by the permeability, and a model for the accumulation process is worked out on this basis. The compaction causes the formation of a lower compaction boundary and an upper layer of melt. The ascending mantle of plumes and convection currents will form layers of melt situated 20–100 m apart. The type of partial melting for this accumulation is critical melting.