Hopes to meet JH on 29 March.
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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.
Hopes to meet JH on 29 March.
Sends GA a spectrum photograph, and explains how JH obtained it.
Returns photographs of spectrum, with observations on the results.
Sends GA two more spectrum photographs [see JH's 1842-4-10], and believes that these may lead the way to color photography.
Returning photographs, with observations. Regarding the transport of loads in hilly country. Remarks on the transcription and pronunciation of foreign languages.
Sends JH the current position of Gamma Virginis.
About the length of a Board of Visitors' meeting, and about arrangements afterward.
Asks GA's opinion as to whether Ordinance observatories should make their magnetic observations on a 3-minute or 5-minute system.
Returning packet of papers on magnetism. Encloses copy of a letter he has sent to Edward Sabine. Has seen the recent eclipse of the sun.
A note to accompany some letters being returned to GA.
Is organizing a committee to revise the instructions for observers at magnetic observatories; GA is on it.
Encloses copy of a letter written to Edward Sabine. Wants instruments of quicker vibration.
About eclipse observations of 1842, together with JH's speculations about the existence of an atmosphere around the sun. Enclosed is an eclipse drawing by Francis Baily.
Asking JH for his views on Charles Babbage's calculating machine, so that he can pass on the information to the Chancellor of the Exchequer.
Needs some clarification of GA's letter [see GA's 1842-9-16] before JH is ready to reply about the calculating engine.
Reply to GA's letter on Charles Babbage's calculating machine.
Robinsons (Devonshire St.) have offered their standard Troy pound, together with its history for £20-0-0. [JH has added notes from his reply regarding the present whereabouts of the various Troy pounds.]
Further remarks on his letter concerning Charles Babbage's calculating machine (see GA's 1842-9-16) in order to clarify JH's mind.
Gives GA some accounting of standard weights in Britain, and feels that it would be worth acquiring Robinson estate weight [see GA's 1842-9-22].
Encloses the Chancellor of the Exchequer's letter concerning Charles Babbage's calculating machine.