Thomas Maclear's assistant and equipment arranged. Observations on copper horse-shoe bars applied to the end of his magnet.
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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.
Thomas Maclear's assistant and equipment arranged. Observations on copper horse-shoe bars applied to the end of his magnet.
Thanks GA for all his efforts on Thomas Maclear's behalf [see GA's 1839-2-25]; comments on some developments in photography, including the work of Nicephore Niepce done in approximately 1826.
About the question of an astronomer for a vacant position at Kew Observatory.
Encloses graph of C. F. Gauss's magnetic observations.
Knows nothing about Kew Observatory, but has heard of the name of the present office holder there.
Has sent to JH papers relating to London University. Hopes JH will accept a senatorship.
Has lost two sons with scarlet fever. Description of house at Playford, Sussex.
Sympathizes with GA in the family sorrow [deaths of GA's sons Arthur and George]; JH complains that house hunting, and other matters, are keeping him from important work.
Regarding C. F. Gauss's magnetical observations. Domestic happenings.
George Everest-Thomas Jervis affair.
George Everest-Thomas Jervis affair. Observations on the production of color by chemical rays.
Concerning JH's experiments with photogenic light. Encloses paper of the comparisons between JH's and the Observatory's barometers. R.A.S. and R.S.L. want a subject for medals in astronomy, R.S.L. for a Copley medal in anything.
Double image micrometer has arrived; limitations and use of it. Wants list of stars for regular observations.
About astronomical matters, such as parallax and variable stars.
Sends suggestions for recipient of R.A.S. medal and comments on JH's 1839-11-29.
Brief note supporting GA's medal recipient ideas [see GA's 1839-12-16], and adding some of JH's ideas.
A note, sent with the manuscript papers of Stephen Groombridge, to JH as President of the R.A.S.
Has a problem with the explanation of interference bands produced by mica being placed between the eye and prism-produced dispersion; the explanation is Baden Powell's.
Writes to supply GA with an address for a reply to JH's 1840-5-16.
Regarding Prof. Baden Powell's paper on dark bands. Is making catalogues of the moveables of the observatory.