Has received from William Lassell some of the new observations he carried out with his new 9" speculum. Comments on these and various clusters of stars changing their position.
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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.
Has received from William Lassell some of the new observations he carried out with his new 9" speculum. Comments on these and various clusters of stars changing their position.
Sends all his observations of Alpha Virginis. Has not done much to this recently. Regarding JH's observations of the fifth and sixth stars in Trapizio. Has informed James Challis of William Lassell's observations.
Enclosing his observations of Alpha Virginis for the past year. Has been attempting some improvements in the double refracting crystal micrometer. Comments on this and his findings. Would like JH's comments.