Lays out various practical rules for the determination of the radii of a double acromatic object glass.
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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.
Lays out various practical rules for the determination of the radii of a double acromatic object glass.
Unable to be at Katers' home for dinner, but will arrive later. JH is pleased to find HK's and JH's measurements of Mars agree with those of JH's father, William, and compares these with some other measures.
Sends first volume of the 'Transactions' of the Astronomical Society to the Philosophical Society of New York.
Advises PL that he has been elected an associate of the Astronomical Society.
FB was elected associate of Astronomical Society.
Informs FA of his election as an associate of the Astronomical Society. Includes message for Alexis Bouvard.
Informing him that he (FA) has been elected an Associate of the Astronomical Society of London. Postscript : Henry Kater hopes to hear from FA soon. Thanks him for tables of Jupiter, Saturn and Uranus.
Announcing his election to the Astronomical Society. Would welcome any communications. Sends reports to M. A. Pictet and thanks for his communications on barometric height. Would be very pleased to be of assistance at any time.
Regarding W. T. Brande's attack on Sir Joseph Banks, and its relation to the Council of the Astronomical Society.
Asks for money pledged for publication of Memoirs of the Analytical Society, which has made no profit. Will be attending testimonial at Cambridge for JW [who has resigned position there].
Shocked by death of [Professor E. D. Clarke], JH supports [J. S.] Henslow as candidate to succeed Clarke. Apologizes for incorrect charging of JW for Analytical Society Memoirs [see JH's 1822-2-23]. Asks JW to find out whether William Whewell will write article on physical astronomy.
Sends the formula for finding the maximum diameter of the planets.
Would like his help on observations of double stars. Comparison of data. Gives details of stars and distances of certain planets from the earth.
Encloses JH's translation of J. J. Littrow's method of determining latitude by pole star. It already appeared in F. X. Zach's Correspondance astronomique.... Send Francis Beaufort's survey of Karamania coast.
Tells CB that JH has seen a calculating machine made by some 'rascally frenchman'.
P. L. Guinand has informed the Astronomical Society that he can make flint glass free from the usual imperfections. Would like any information from JN. One of his papers has been named as likely to receive a prize. Hears that an arithmetical machine has recently been demonstrated before the Institute. Have any details been made public?
Sends first volume of Astronomical Society's Transactions and JH's paper on aberrations ['On the Aberrations of Compound Lenses.' 1821]. Asks for geodesical results at Ã…bo.
Please forward enclosed note to Mrs. Roget [wife of P. M. Roget?]. Various items of interest.
Leaving town for a week. Will read [Francis Beaufort's] book after return. Delighted by 'two instances of good fortune' in one week at Union Place [HK's home].
Received letter and packet from J. J. von Littrow, with request that TC order clock from Robert Molyneux for Littrow. Encloses Littrow's Vienna observations.