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3. On the Decennial Period in the Mean Amplitude of the Diurnal Oscillation and Disturbance of the Magnetic Needle and of the Sun-spot Area

Published online by Cambridge University Press:  15 September 2014

J. A. Broun
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Extract

The author, in presenting results relating to the decennial period derived from observations made at Trevandrum during twenty-two years, has sought a redetermination of the mean duration of that period, as shown by preceding magnetical observations connected with his own. The relation of the frequency and area of sun-spots to the amplitude of the diurnal movements of the magnetic needle gives an increased value to this investigation.

Type
Proceedings 1875-76
Information
Proceedings of the Royal Society of Edinburgh , Volume 9 , 1878 , pp. 155 - 158
Copyright
Copyright © Royal Society of Edinburgh 1878

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