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The Sir John Herschel Collection
The preparation of the print Calendar of the Correspondence of Sir John Herschel (Michael J. Crowe ed., David R. Dyck and James J. Kevin assoc. eds, Cambridge, England: Cambridge Univ. Press, 1998, viii + 828 pp) which was funded by the National Science Foundation, took ten years. It was accomplished by a team of seventeen professors, visiting scholars, graduate students, advanced undergraduates, and staff working at the University of Notre Dame.
The first online version of Calendar was created in 2009 by Dr Marvin Bolt and Steven Lucy, working at the Webster Institute of the Adler Planetarium, and it is that data that has now been reformatted for incorporation into Ɛpsilon.
Further information about Herschel, his correspondence, and the editorial method is available online here: http://historydb.adlerplanetarium.org/herschel/?p=intro
No texts of Herschel’s letters are currently available through Ɛpsilon.
Offers possible explanations to account for discrepancies between assays of WM and of Thomas Graham.
The yellow substance turns out to be pentasulfide of arsenic, with a slight excess of sulfur; comments on its properties.
Thanks for the photographic notes and for the remarks on color blindness. The remarks on the composition of colors interested him as he has difficulty in distinguishing shades of brown and green.
WM's friend William Huggins is a candidate for the fellowship of the R.S.L. and would be pleased for JH's support. Please return the certificate to WM when he has signed.
The Meteorological Committee of the R.S.L. is about to commence publishing the summary of the observation collected from the seven observatories. Would like JH's advice on method of publishing the barometric observations.
Is fully satisfied with the objections in WM's letter regarding the individual records of barometric pressure. Gives advice on how the records should be shown.