Royal Institution | 8 Novr. 1852
My dear Herschell
I send you a letter I have received from M. Wolf1 as he especially desires. After you have seen it I will send it if you approve according to his wish to the Royal Society or to the Astronomical2 if you think it better[.]
Ever faithfully Yours | M. Faraday
Endorsed by Herschel: Period of solar spots 9 Periods in 100 y or 11 y 11 Min to Min
The commencement 1800, &c. of each century is a minimum
WOLF, Johann Rudolf (1852d): “Sur le retour périodique de minimums des taches solaires; concordance entre ces périodes et les variations de déclinaison magnétique”, Comptes Rendus, 35: 704-5.
Please cite as “Faraday2587,” in Ɛpsilon: The Michael Faraday Collection accessed on 27 April 2024, https://epsilon.ac.uk/view/faraday/letters/Faraday2587