About some major variations in terrestrial magnetism readings.
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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.
About some major variations in terrestrial magnetism readings.
As GA is about to leave on holiday, he brings JH up to date on the state of the nebula calculations [see JH's 1862-5-28].
Material sent by JH [see JH's 1862-4-2] arrived safely.
Acknowledgment of receipt of more material from JH [see GA's 1862-4-3].
Needs to know, from JH, the date of the nebula observations [see GA's 1862-4-9].
Acknowledges receipt of more material from JH [see JH's 1862-4-13].
Sends JH a copy of the form to be used for reduced observations [see JH's 1862-4-17].
Acknowledges receipt of payment [see JH's 1862-4-25]; asks for final approval of printing structure for the nebula catalogue.
Seeks clarification of the position of one of the listed nebulae [see JH's 1862-4-30].
Attempts a more accurate estimate of work to be done on nebula catalogue [see JH's 1862-6-27].
The reductions are essentially complete; encourages JH in his part of the work and concludes 'It will be a noble work' [see JH's 1862-11-5].
Has received notice from the Foreign Office that the Russian Government has sanctioned the establishment of a magnetic and meteorological observatory at Pekin.
Estimates seven weeks and £10 to compute JH's nebulae data. Suggests JH use new 'Skeleton Form.'
[Responding to JH's 1862-1-23], states that R.A.S. finances not sufficient to publish JH's 'Catalogue of Nebulae,' but R.S.L. is 'rolling in wealth.' Work could be done at [Greenwich Observatory], where GA is already printing 'Skeleton Forms for Precessions.' Forwarded R.S.L. certificate for [E. J.] Lowe to W. H. Smyth.
Send quickly JH's manuscript of 'Catalogue of Nebulae.' It will provide work for computer whom GA was about to lay off. Prefers reducing JH's data to 1860's. GA's improvement on F. W. Bessel's reduction formula.
Printing 1000 copies of JH's Catalogue [of Nebulae]. Please transfer funds to GA to cover expenses.
Ferry delayed by 19 July hurricane. Studying classical granite veins in Glen Tilt under [J. D.] Forbes's tutelage. Not disturbed by cost overrun of JH's catalogue of nebulae, but sorry that JH is 'so much vexed.' Simply tell R.S.L. committee that JH needs more money; do not worry about scruples.
Proposes continuing work on JH's [Catalogue of] Nebulae, and not worrying about funding. Gives details of money and time spent so far. Work is about half done.
Sorry to hear about JH's pain. Encloses notes from GA's testimony to parliamentary committee investigating changing standards of weights and measures. GA's work continues on 'veritable precessions.'
Little work remaining in calculations for JH's nebulae. Likes JH's plan to represent 'the quantification of different qualifications' by numbers. Hold payment until work is done. Astounding disturbances in 'magnetic curves' (1841-1857). GA now accepts usefulness of magnetic observatories.