Concerning object-glasses.
Showing 21–40 of 66 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 object-glasses.
Concerning the new meridional instrument. Is JH coming to town soon?
Willing to let GA choose the best objective lens [see GA's 1848-4-5]; then JH offers another possibility; all are ill at Collingwood.
Regarding the reinstatement of the zenith tube.
Further information on the zenith tube. Description of a zenith tube.
Does not believe that GA's proposal [see GA's 1848-5-4] will work.
Apologizes for having questioned GA's proposal [see GA's 1848-5-6], which is very good and should work well.
Received proof pages of Admiralty Manual [see JH's 1848-2-2], and wants to add a paragraph on the zodiacal light [which GA attaches].
Regarding Mary Somerville's proposals for extraordinary terrestrial refractions—Admiralty Manual.
Agrees that no requests for additional observations should be made of Thomas Maclear; Admiralty Manual is about to be printed [see GA's 1848-7-15].
A note accompanying JH's copy of Admiralty Manual [see JH's 1848-7-15 or later].
Forwarding some misdirected proofs of ship's officers instructions to JH [see GA's 1848-7-17].
Asks JH for his opinion of F. W. A. Argelander's letter concerning the publication of his work by the R.A.S.
Wants more information about a Venus parallax expedition.
Forwards a letter about the Venus parallax expedition [see GA's 1848-9-21], and adds some comments.
Reports that William Lassell has written to say he has discovered the 8th satellite of Saturn.
Personally would like to have F. W. A. Argelander's work printed [see GA's 1848-9-13], but will need to get a wider opinion; also asks about sharing money available from the Admiralty [see GA's 1845-10-24].
Explains how the money from the Admiralty came to be awarded as it was [see JH's 1848-9-24].
Comments about the proposed Venus parallax expedition and their method of measurement [see JH's 1848-9-24].
Sends comments on the pages of JH's account of the moon's motions [see JH's 1848-9-25].