Thanks to WH for the photograph of solar protruberances; comments on polarization of light from the sun.
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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.
Thanks to WH for the photograph of solar protruberances; comments on polarization of light from the sun.
Is obliged for GM's letter and for the trouble he has taken over JH's paper on musical scales. Object in writing this paper was to clear the ground as it were. Elucidates some of the points in his own paper and comments on parts of GM's paper.
Seems to JH to be some systematic error in some of RM's observations; JH includes examples.
Comments on JH's son's reports [see GS's 1868-11-6]; recalls idea of JH's father, William Herschel, about nature of solar light; transit of Mercury 'beautiful'.
Thanks for paper on physical constitution of sun and stars. Discusses possibility of vast atmosphere for sun.
Thanks for paper on action of solar and electric light on vapors, which should give JT further insight into blue color of sky and polarization of skylight. Comments on the latter. JH's son [Alexander] is working hard at Glasgow.
Solar spectrum observations of John Herschel (son of JH) may have produced detection of the photosphere and corona at a time other than a total solar eclipse.