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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.
In response to a request, JH is not willing to part with any letters from his father, William, but will send one of William Herschel's notes to his sister, Caroline.
[Responding to JR's 1847-12-28], JH gives advice where to buy actinometers and what features to look for. JH cannot advise about hygrometers as these are to be used in very cold climates.
Provides details about where to buy actinometers, and what type to buy.
Tells AB about the state of education in South Africa when JH was there, comments on his part in such reforms as were made, and gives all the credit to Sir George Napier.
Thanks JH for the receipt of a report of JH's work.
JH has arranged for U. J. J. Leverrier, J. C. Adams, and Wilhelm Struve to visit JH together at Collingwood. JH is writing to invite JL to join them.
Wishes to use remarks JH made at Kew Observatory in 1846 for a Royal Society publication. Asks JH to read transcript for accuracy.
Has had a compensating barometer constructed. Requests thoughts concerning compensating barometers. Sends some memos concerning pendulums and other topics.
Wants JH to name the circle of uniform temperature of the ocean near the equator. Explains the circle of uniform temperature.
Sends ideas about southern deviation of bodies falling from the perpendicular. Desires corrections. Is investigating methods of launching bodies so they fall without deflection.
Has examined southern deviation of falling bodies. His results differ greatly from WR's. Presents formula and asks WR to reconsider. Will not present these ideas to the B.A.A.S.
Has re-examined work on southern deviation. Still cannot see his mistake. Re-presents his ideas for further comments.
Sorry he did not see JH in London. Hopes JH will support John Lefevre for a position at the University.
Sends Principles of Natural Philosophy from the Swedenborg Association. Published nearly one century earlier, its contents should interest JH. Contains a nebular theory commonly attributed to [P. S.] Laplace.
Now commanding the Herefordshire. All navigators must prove their competency. Asks JH for such a certificate.
Asks: for name of instrument maker JH recommends for construction of actinometers; which hydrogrameters should be taken to Mackenzie's River; and whether JH has any experiments he would like done in America.
Encloses application for meteorological and magnetic observatories from governor of New Brunswick. May establish observations in all colonies for limited time. Puzzled over [John] Lefroy's results from Athabasca.
Has discovered a flaw in the theory of actinometer observations. Realizes that JH's actinometer observations at the Cape may be useless and that observations made at Government and East India observatories should be suspended.
Copies of 1847-2-20 letter will be sent to observatories utilizing actinometers. Earlier series will be replaced with accurate figures. Suggests method to measure temperature in actinometers.
Should ES send thermometers to observatories? JH and [Francis] Beaufort to consider debt owed to Hudson Bay Company. Sends letter describing photometer of [John] Ball for JH's opinion.