Comments on the mathematical ratios in chords at some length, in answer to RP's 1869-11-18.
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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 the mathematical ratios in chords at some length, in answer to RP's 1869-11-18.
Proud of WJH for introducing improvements into Indian judiciary system. Sorry to hear that WJH may have to leave Dacca.
Questions about Indian civil law regarding Bengal promisory notes and duties on probate.
Discusses discrepencies between his observations for September and WS's photograph. It seems the new spots result from Jupiter being in opposition.
Describes the similarities between JH's sketches and WS's photographs of sunspots. Has greater faith in own observations. Wishes WS would add Julian dates. Sends Professor [George?] Morton's photographs.
Proposes a method of diminishing the effect of a ship's rolling and pitching on a person on a cot or chair on the ship.
Is not prepared to come to any distinct conclusions about the effect of local attractions in geodetic surveying, but talks about the problem for the whole letter.
Asks son John to stop at the British Museum and get the completion of a quotation JH needs; also asks John to pick up JH's R.S.P.T. copies not picked up recently.