Thanks for engraving of Saturn; comments on other aspects of observing that planet. JH notes he is confined to a wheelchair.
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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.
Thanks for engraving of Saturn; comments on other aspects of observing that planet. JH notes he is confined to a wheelchair.
Thanks for engravings of Saturn and Jupiter; would like to see an astronomical picture book produced.
Thanks for photograph of the moon.
Thanks for the lunar photographs; comments on other observations.
Has now had time to examine the stereoscopic photograph of the moon. Thinks it is a wonderful effect and opens up a new field for terrestrial objects.
Requests information about specula for telescopes, especially silvered glass ones.
Further questions about the physical optics of telescopes [see JH's 1859-8-27].