Explaining some of the signs in the enclosed table. Has sent the Nautical Almanac for 1867.
Showing 21–36 of 36 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.
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.
Glad that JH approves introducing Julian dates. Notes their use in American lunar tables. Positions of three new nebulae.
[Jean] Chacornac found nebula in Coma Berenices that JH thought had disappeared. It is highly variable. Notes on nebulae of variable magnitude.
Positions of new comet, calculated from 'Florence observations.'
Compares positions for variable nebula in Taurus reported by several astronomers. Plans to incorporate JH's suggestion regarding Julian calendar into more convenient table of dates.
E. W. L. Tempel's 1860 discovery of nebula near Merope.