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(1) In this paper a new method is suggested for the reduction of the great number of pairs of auroral plates that have accumulated during the Polar Year, and will continue to be obtained in future. The existing methods of determining the height and geographical situation of the aurorae require plate‐measurement and mathematical calculation. There should, it would seem, be some mechanical‐optical method which, despite a possibly considerable initial cost for the equipment needed, would in the long run save much time, labor, and money. The impulse to think out such a method came from suggestions made to me by Dr. la Cour, at Brussels in July 1934 and, more effectively, at London in September 1934. |
