Writes to compare notes on sunspot observations.
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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.
Writes to compare notes on sunspot observations.
Has no idea whether the sunspots appeared suddenly or gradually. The Kew people may be able to help in this matter. Comments on some more sunspots.
Would like him to accept the enclosed paper on the cause and effect of dew. Comments on various points.
The volumes of the Sinai photographs will be dispatched tomorrow. The cost of the survey has been covered by subscriptions and he will forward a statement of the account later.
Sends a copy of his own book, the Immortals, which he would like JH to glance at as the Herschels are mentioned.
Comments on ability of eye to adapt to prismatic glass in corrective spectacles for double vision [see JH's 1869-10-31]. Heard of bad health of DS and John [Stewart]. JH is fighting bronchitis.
No permanent optical solution to DS's double vision. Remarks on description by DS's son of cavalry duty in Ireland and Canada.
Examples from Iliad and other sources to show that military offensive tactic called 'Vertical Fire' did not originate with [L. N. M.] Carnot, as Mr. Mallet claimed in recent issue of Budget.
Note to accompany forwarding of a letter; remarks on T. R. Robinson's upcoming cataract surgery.
Comments on the effect of great temperature variations on the speculum of a telescope.
Informs JH of plans for JH receiving 5 pounds of coca he had ordered.
Encloses letter giving charges for 5 pounds of coca ordered by JH [see PR's 1870-4-1]. Asks how PR should pay.
Asks whether WS has photographs of the sun for 21 and 22 April. Notes how curious sunspot activity has been. Doubts that such is reconcilable with the notion of 'meteoric in-falls.'
Is sending solar autographs. Notes that in groups of spots the larger precede the smaller spots. Can JH form any theories from this?
Detached postscript that discusses the margins of the two photographs, which seem to show that all planets are in the near hemisphere.
Is returning March heliographs. Discusses the appearance of the spots. Has not received the April heliographs.
ES has been forwarded letter explaining why 'great telescope' at Melbourne will not work and suggesting construction corrections, on which JH, who believes such 'a priori condemnation' unjustified, comments herein.
Thanks for his pamphlet on 'Trade Unions and the Cost of Labour.' Comments on this.
Discusses her theory of aerolites and the zodiacal light. Used to visit his house at Slough.
Thanks for his letter about her theory regarding aerolites. Has another query on this question.