Has just been able to consult Sir William Herschel's papers. Regarding Yvon Villarceau's method of measuring the orbits. May be like his own, which he briefly outlines.
Showing 1–20 of 28 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.
Has just been able to consult Sir William Herschel's papers. Regarding Yvon Villarceau's method of measuring the orbits. May be like his own, which he briefly outlines.
Would like to ask a few more questions regarding JH's method outlined in his last letter. Can UL submit it to the Institute?
Found his letter on return from London. Would be pleased for UL to submit part of his letter of 19 Mar. to the Institute. Further comments on part of this letter.
Has just received JH's letter giving details of an interesting auroral phenomenon. Has been experimenting with wire insulates. Henry Lawson has observed streams of red light resembling aurora.
Tells GA about the internal counterpoise system in use in some German telescope mountings, and includes a diagram; JH knows nothing about chilling speculum metal [see GA's 1849-3-7].
Received news today of JS's arrival in Bombay. Describes conflict as 'Armageddon.' Family news. John Stewart returned from China and leaves soon to meet Matilda [Grahame] in Paris. [Richard] Jones's concern for JS is genuine. Eneas Mackintosh obtained cadetship for JH's son John at Addiscombe.
Asks JH's opinion about GA's plan not to print a separate volume of magnetic and meteorological observations for 1848.
Some concerns about GA's intent of attaching magnetic and meteorological observations to the R.A.S.'s Astronomical Observations [see GA's 1849-3-28].
Will reconsider the proposal about printing observations [see JH's 1849-3-29], and get back to JH.
Sends sample of photographic lenses ground by JJ. Asks JH for formula of curvature to admit more light.
Shall send a catalogue of double stars observed by [W. S.] Jacob. Gives some information about several measurements to establish standards.
About an astronomer for the Madras observatory. Suggests ways to reduce glare and so improve measurements [see RS's 1849-3-4].
Asks GA if he knows of any rules or pitfalls in calculating time from earlier times [even B.C.] to the present.
Has little advice to offer JH about time calculation [see JH's 1849-3-29], except for fairly standard reminders.
Regarding the 'chilled' casting of a telescope.
It is now time that they speak to John Russell (1st Earl Russell) concerning [Francis?] Ronald[s]. Would next Friday suit him?
Arrangements about JH coming to London to go with SC to see John Russell (1st Earl Russell) [see SC's 1849-3-17].
Finds that some of the pages from the paper JH recently sent him are missing. Please send if he still has them. H. P. Brougham (Baron Brougham and Vaux) does not mean to attack the undulating theory. Regarding solar spots and the surface of the moon.
On return of a paper, and approval of AD's method of resolving fractions.
Regarding the early history of the calendar. Comments on the various versions.