Visits F. W. Bessel in Berlin to discuss pendulum experiments. [C. A.] Steinheil invented a photometer to measure relative light of different stars.
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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.
Visits F. W. Bessel in Berlin to discuss pendulum experiments. [C. A.] Steinheil invented a photometer to measure relative light of different stars.
Received JH's note from Belvedere Hotel. Mentions various arrangements regarding JH's European journey, including JH's planned visit to Wilhelm Olbers.
Unless other responsibilities interfere, HS will meet JH in Bremen.
In compliance with JH's request, HS did not go to Bremen to meet JH. Hopes JH will visit him in Altona and stay at his house.
Asks if he can publish the finding that the star in Argo is dimming in Astronomische Nachrichten. Questions whether barometric information should be in feet or yards. Asks JH about a publication that HS and [Alexander von] Humboldt are planning.
Forwards a request from C. F. Gauss for magnetic observations made in England.
Asks permission to use information from JH's letter in Astronomische Nachrichten. Believes [Alexander von] Humboldt can explain observational anomalies that JH notes.
Asks JH to petition King Christian VIII of Denmark to support the Altona observatory.
Thanks JH for suggesting that the R.A.S. write to King Christian VIII, but requests that JH include his own name and mention Astronomische Nachrichten.
Has been busy with geodetic work. Pulkowa instruments are excellent. [F. W.] Struve has sent zenith distances of Ursa Majores. [G. von] Reichenbach's death dealt blow to precision of Munich instruments.
Has not received parcels from Royal Society. Wants JH to send notice of proposal to Astronomische Nachrichten. Remarks on JH's requiem for William Herschel's large telescope. Asks JH to thank King of Denmark directly for the order conferred.
Asks about the claim that JH professes that the moon affects the atmosphere and about possibly related research. Received paper on constellations for Astronomische Nachrichten.
JH's return of order offered him was painful. Will report in Astronomische Nachrichten that JH denies meteorological theory attributed to him and that the 'Wiener Wirtschaftskalender für 1840' is based on JH's authority.
Asks JH to thank King Christian VIII of Denmark for the order, even though JH cannot accept it. Sends a mathematical puzzle.
Saw article in the [London] Times about Lord Rosse's telescope. Has received a letter from [James] South. Asks for information from JH for private use. [Francesco] del Vico has observed triple stars, but HS thinks the telescope by [R. A.] Cauchoix is flawed.
Sends copy of announcement from [Hervé] Faye at Paris observatory of a new comet in Orion. Requests use of JH's letter about double tail on [Halley's] comet in Astronomische Nachrichten. Note from Faye has a gross error in location of comet.
Announces the discovery of a new comet by [Heinrich] D'Arrest, a university student. Wilhelm Struve has seen it.
[J. C.] Houzeau has sent a paper on the determination of parabolic elements of a comet. Relays a copy of his method, which HS will examine more closely before publishing.
Announces the discovery of a new 'planet' by [K. L.] Hencke of Prussia, of the class of 'the 4 small ones' [the asteroids].
Circular announcing that [Theodor] Brorsen in Kiel has discovered a new comet. HS adds note that F. W. Bessel has died.