Comments on remarkable solar activity. JH admits he has no theory to explain sunspots.
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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.
Comments on remarkable solar activity. JH admits he has no theory to explain sunspots.
Discusses the movement of the 'great group' of sunspots over the last six months. Asks WS to sign a certificate for his son [John].
Has received, through the good offices of the Smithsonian Institution, a number of back issues as well as current issues of the Proceedings of the American Philosophical Society of Philadelphia. The best way to send these volumes is by way of the Smithsonian.
Thanks WS for August 29 photographs. Is sending JH's son's [John's] certificate. Pities the 'fallen Emperor' [Napoleon III].
Gives advice to son John about whom to ask for a signature for the certificate for fellowship in the R.S.L. [see JH's 1870-8-4]; talks about the war [Franco-Prussian ?], and announces the birth of a son to daughter Amelia and Thomas Wade in Peking.
Approves of ES's actinometric methods, but wonders about absorbent power of alcoholic liquid. Laments 'sad conclusion' to career of 'Hansa,' and hopes her companion is more successful.
Thanks for telegram and has dispatched papers about absorption power of actinometer liquid. Hopes letter written in Lady Sabine's handwriting does not indicate serious illness of ES.
In commenting on a paper on actinometric measurements varying with depth of atmosphere, JH questions the accuracy of the equipment used.
Will send manuscript of article by JH's daughter [?] on history of Alsace and Lorraine for publication in NM's Good Words. JH is busy compiling general catalog of all known double stars.
Thanks for grant of £50 from B.A.A.S. for calculations related to request from Georg Erman [see JH's 1870-5-6].
JH is preparing a digest of all double star observations; also comments on sunspot activity.
Discusses significance of Col. Napier's pendulum observations to research on earth's constitution and gravitation.
Asks a whole series of silly riddles, and JH complains of not having heard from AD.
Writes to clarify the actions of the B.A.A.S. [see JH's 1870-5-24].
Corrects date on publication by G. A. Erman.
Requests some rewording of B.A.A.S. resolution [see JH's 1870-9-27].
Having been placed jointly in charge with G. A. Erman of a B.A.A.S. grant expenditure to support H. J. R. Petersen's recomputation of Gaussian constant for 1829, JH asks for corrections in the statement of the actions funded.
Apologizes for not writing often. Has been ill. 'Moderate' use of 'Coca de Peru' [cocaine] helps. Is working on a 'General Catalogue of double stars reduced to 1830.0.' Acknowledges works received.
Corrects a misunderstanding about the date to which magnetic observations are to be reduced.
Gives JG a journal reference.