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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.
About eclipse observations of 1842, together with JH's speculations about the existence of an atmosphere around the sun. Enclosed is an eclipse drawing by Francis Baily.
Asking JH for his views on Charles Babbage's calculating machine, so that he can pass on the information to the Chancellor of the Exchequer.
Needs some clarification of GA's letter [see GA's 1842-9-16] before JH is ready to reply about the calculating engine.
Reply to GA's letter on Charles Babbage's calculating machine.
Robinsons (Devonshire St.) have offered their standard Troy pound, together with its history for £20-0-0. [JH has added notes from his reply regarding the present whereabouts of the various Troy pounds.]
Further remarks on his letter concerning Charles Babbage's calculating machine (see GA's 1842-9-16) in order to clarify JH's mind.
Gives GA some accounting of standard weights in Britain, and feels that it would be worth acquiring Robinson estate weight [see GA's 1842-9-22].
Encloses the Chancellor of the Exchequer's letter concerning Charles Babbage's calculating machine.