Deals with several problems related to several papers.
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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.
Deals with several problems related to several papers.
Is pleased to hear his own sons are progressing well. Hopes Caroline (JH's daughter) will soon be able to come out. Is temporarily in charge of the Bombay army, which gives him plenty of work.
Is still trying to bring the various definitions of the pound into agreement [see GA's 1867-11-30]; the question of weighing in air or vacuum remains as a problem.
'Not Sent.' Clarifies values quoted in JH's letter of 5 Nov. to RS.
Thanks JH for his useful letter [see JH's 1867-12-2]; it will be of value to the Commission on Weights and Measures.
Having helped to create confusion surrounding the pound weight [see GA's 1867-12-3], JH now understands it simply and clearly; JH wonders if he is 'growing elderly.'
Compares values obtained by various observers in measuring new standards of weight and length.
Apologizes for not writing sooner. Busy with trip to Italy. Announces intention to dedicate entire next year to his Physique sociale. Thanks JH for his comments on AQ's son's work on temperature. Also grateful for commendation on AQ's history of science. Brings up AQ's son's work on proper motion.
Thanks JH for his clear letter [see JH's 1867-12-3] about the pound weight standards.
Was grateful for his kind note and check. Family is still in difficulties. Employed by a Liverpool firm to sell engineering articles.
Describes JH's theodolite by G. F. Reichenbach and offers to loan it for PB's survey [of Sinai Peninsula].
Discusses WM's reply regarding commercial weight of new Standard Pound.
Discusses coming year. Asks JH how to deal with JH's review [of AQ's Lettres sur la théorie des probabilités]. Talks about his friend [Michel] Chasles. Also about AQ's son. Mentions JH's translation of [J. C. F. von] Schiller's 'Spaziergang.'
Measurements by A. T. Kupffer afford greater accuracy for [specific] gravity of water than values used by Henry Kater as quoted in postscript of JH's 5 Nov. [1867] letter to [WM].
Clarifies information in postscript of JH's letter of 5 Nov. to RS.
Discusses translation of 'Enochus.' Thanks JH for the 'Rex Colius,' which amused Adam Sedgwick and WS.
Comments on reports of meteor sightings from the United States and Italy; explains why one may see a satellite of Jupiter where there is none.
Please clarify differences between French metric system and JH's adaptation of British system of measurements. Willing to raise issue in Parliament, but wants to understand it well. Hopes to see Emma soon.
Is exceedingly grateful for the Synopsis of William Herschel's double-star observations. Comments on some of the readings. Has read his translation of Schiller's 'Spaziergang' with pleasure. Will be writing to Margaret Brodie Herschel.
Sending the syllabus of Mr. Ellis's lecture. Has sent to JH's son [Alexander] a paper on meteors, which contains his views in cosmical philosophy. Elected Laurence Parsons (4th Earl of Rosse) to the R.S.L. yesterday.