Abstract
In order to obtain true primary variations, meteorological variations must be eliminated. A method of eliminating atmospheric effects has been developed, tested, and applied. The method was applied to the deduction of true variations, essential in cornection with solar activity, namely, of long-term seasonal changes of diurnal variations and for the determination of the direction of the source of diurnal variations. The results differ in many points from those of other investigators. This method of elimination is now limited only by the accuracy of temperature data. It is used systematically at all Soviet stations for permanent recording of cosmic rays. (A.C.)
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