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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.
Thinks it may be a good idea to utilize aluminium to coat the speculum of reflecting telescopes. Is shortly to take command of iron works and furnaces and hopes to carry out experiments to produce barytic glass.
Sends [William?] Pole's paper on color blindness, in case JH wishes to examine it.
Found his letter acknowledging the gift of his book awaiting him on his return from the continent. Reasons why he wrote the book. Has had letter from William Whewell. Hears that JH's health has not been good.
Acknowledges receipt of a paper by [William] Pole, which JH will review.
Returned late on Thursday. Is gratified by JH's praise of his drawings of Saturn. Includes some further drawings and comments on JH's queries.
Pleased to hear that JH was engaged on his old pursuits. Is grateful for pointing out his mistake. Regarding meteorological registration by means of photography.
Made some observations of Jupiter after his last letter. Thought JH might be interested in seeing them. Would be grateful for any comments, which he will incorporate into his final drawing.
Thinks that aluminum coating on telescope mirrors may work [see FK's 1856-10-9]; also suggests looking into flouric glass containing aluminum for lenses of low dispersion power.
Sends some photographs with comments. Pleased to hear JH is in much better health. Received a circular from U. J. J. Leverrier requesting meteorological information. Sends meteorological observations made at the Observatory during the last fourteen years.