Abstract
WOLF'S NUMBERS FOR 1891.—Comptes rendus for January 18 contains a communication by M. Rodolf Wolf on the state of solar activity in 1891. The following table shows the results of solar observations made at Zurich Observatory, and magnetic observations made at Milan. The relative numbers (γ) have been obtained by the method used in previous years.
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Our Astronomical Column. Nature 45, 307 (1892). https://doi.org/10.1038/045307a0
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DOI: https://doi.org/10.1038/045307a0