Showing 21–40 of 42 items
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.
Agenda items for next meeting of 'Committee for Superintending the Construction of Standards.' Compares English, French, Danish, and Prussian standards.
A notice of meeting of the Standards Committee.
Provides JH with the measurements from a series of observations of Gamma Virginis.
Finds GA's measurements of Gamma Virginis far away from JH's own, and instructs GA in the best way to measure double star positions.
Regarding the measurement of angles. Observations on a problem set by JH.
Regarding a telescope for Thomas Maclear.
Has received a request from the Admiralty to order a new telescope for the Cape observatory; at the same time, JH has received an unsolicited offer of a lens. JH seeks advice and information from GA.
Provides JH with information and advice about large lenses, which JH is considering for a Cape of Good Hope Observatory equatorial telescope.
Regarding custody of the Standards.
Regarding the storage of the Standard weights and measures.
Makes some suggestions about possible storage places for the United States' standards [see GA's 1843-9-9].
Describes some available glass discs, which might do for making lenses for a large refracting telescope [see GA's 1843-8-30].
Requires information on an actinometer.
Gives formula for defining the measure of the scale of an actinometer.
Recommends buying optics for 7.5-inch telescope from Metz and Mahlers in Munich and having those mounted in London.
Encloses copy of a paper for JH's comments. Regarding reviews of GA's paper on 'Tides.'
Urges doubling number of lunar observations.
Would support improvements, both in number and quality, of lunar observations at the Royal Observatory; current practices produce unacceptably large predictive errors.
A notice of meeting of the Standards Committee, together with an indication of business to be conducted at that meeting.
Changes the date of a Board of Visitors' meeting and urges JH to be there.