Showing 81–100 of 1894 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.
Sees that JH mentions 'the longitude of perihelion on the ecliptic' as one of the elements he would like to have in the case of the small planets. Would like his advice.
Comments on JH's advice regarding the 'longitude of perihelion in the ecliptic.'
Explaining some of the signs in the enclosed table. Has sent the Nautical Almanac for 1867.
Sending the revision of the first half sheet for the 1867 supplement containing the latest elements of the small planets.
JH's letter went to the old address, which accounts for the delay. Regarding his query, gives date of the conjunction of the planets.
Regarding the comet seen at Melbourne (Australia), may be the 1843 comet discussed by JH in his Outlines Astr. Comments on this.
Further regarding the southern comet; does not think it can be the 1843 one until he receives further observations.
Sending the elements of 79, 81 and 82; is not certain if N. R. Pogson has sent the orbit for No. 80. It is reckoned in the same way as in the last edition of JH's Outlines Astr.
Thinks that E. W. L. Tempel's comet may be connected with that of Biela. Comments on this.
Regrets his reply [to Hind's 1866-1-30?] is late owing to absence on an excursion. Has not heard that either comet has been perceived. Has not seen Otto Struve's remarks.
[John?] Farley has just given him the readings for the minor planets. Encloses these and also readings for the major planets from U. J. J. Leverrier.
Sends photograph of a medal lately struck in Paris to commemorate the discovery of 100 asteroids, on which Hind appears.
His last note on the Julian period puzzled him. Has not taken many double star measurements, but will send on a few later. Has not finished the ecliptical charts yet. Regarding a planet more distant than Neptune.
Would like his views on an actinometrical scheme. Has been busy over the affairs of the late Sir James C. Ross.
Is grateful for JH's notice of his ideas. Outlines his ideas for an actinometer.
Finds there is not one of JH's actinometers at Kew; would be grateful if he could inform him who has been working with one.
Thanks for the information. Has written to Henry Barrow, and to Negretti and Zambra. The latter can supply actinometers for 14 guineas; too expensive for him. Barrow has just replied that he can supply for 6 guineas.
Tried Kew and the Admiralty for actinometers but had to obtain one from Henry Barrow in the end, which was broken en route. Thinks these are too fragile for mountain climbing.
Is grateful for JH's reply. Gives reasons why he was looking for smaller and more portable instruments to take with him to the Alps.
Has now applied to the R.S.L. for a Government Grant and would like JH's support for his application. Wishes sunfall as well as rainfall was recorded.