Concerning P. A. Hansen's observations of Lunar irregularities.
Showing 21–39 of 39 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.
Concerning P. A. Hansen's observations of Lunar irregularities.
Regarding the proposed eight-inch object glass. Supplementary estimate for the Admiralty. Extract of a letter from Otto Struve.
Regarding modifications for the actinometer. Has written to Georg Merz regarding the object-glass. Regarding the eight-inch object-glass. Name of the maker of his actinometer. [JH has written a rough draft of his reply to this letter on the same sheet.]
Georg Merz's practice regarding the sale of object-glasses. Is preparing a model of a transit circle.
Concerning object-glasses.
Concerning the new meridional instrument. Is JH coming to town soon?
Regarding the reinstatement of the zenith tube.
Further information on the zenith tube. Description of a zenith tube.
Regarding Mary Somerville's proposals for extraordinary terrestrial refractions—Admiralty Manual.
Asks JH for his opinion of F. W. A. Argelander's letter concerning the publication of his work by the R.A.S.
Concerning the eighth satellite. Observations on U. J. J. Leverrier's paper.
Queries regarding the perturbation sheets.
Encloses perturbation sheets for checking.
Has received further proof sheets of the perturbations from the printer. Regarding Isaac Newton's theory of the motion of the moon's apse.
Further regarding GA's defense of Isaac Newton's theory on the moon. J. H. Seyfforth's theories seem plausible. Ipswich Philosophical Society.
Regarding the annual equation of the moon's motion.
Regarding the annual equation of the moon's orbit.
Observations on JH's chapters [of Admiralty Manual?] received from the printers.
Comments on observational quality obtainable with the great telescope of William Parsons [Earl of Rosse].