To Alexander von Humboldt   1844-6-10 or [1844-5

The transcript of this letter is not available online on Ɛpsilon.

Please cite as “Herschel10711,” in Ɛpsilon: The Sir John Herschel Collection accessed on 29 April 2024, https://epsilon.ac.uk/view/herschel/letters/Herschel10711