Asks JH about RP's astronomical deductions concerning the ancient dates of five celestial phenomena, e.g., heliacal rising of Sirius, a new moon.
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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.
Asks JH about RP's astronomical deductions concerning the ancient dates of five celestial phenomena, e.g., heliacal rising of Sirius, a new moon.
Clarifies questions and includes his calculations of number of days since the five phenomena (see RP 1850-3-13). Will send some calculations to Astronomer Royal.
Astronomer Royal [G. B. Airy] has responded to RP's queries. JH was right about him being off one day in his calculation.
JH having liked RP's book on Egyptian chronology, asks JH for a testimonial for position in Department of Antiquities at British Museum.
Thanks JH for recommendation for position in Department of Antiquities at British Museum.
Being able to conclude only that J. B. Biot was wrong in his conclusion, RP cannot make computation (per JH's request) about heliacal rising himself. Has applied to G. B. Airy to do it. Expresses difficulty in attaining accuracy about any ancient author's recording of a rising.