Mr Faraday’s Compts to Mr. West and begs to inform him that both the specimens are of Iron pyrites. They contain no copper[.]
Royal Institution | 10th Sept 1830
Please cite as “Faraday0461,” in Ɛpsilon: The Michael Faraday Collection accessed on 28 April 2024, https://epsilon.ac.uk/view/faraday/letters/Faraday0461