Discusses study of light, JH's theories on the subject, and his own photometer observations. Asks JH for further explanations of his theory.
Showing 61–80 of 130 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.
Discusses study of light, JH's theories on the subject, and his own photometer observations. Asks JH for further explanations of his theory.
Requests JH consider taking Chair of Natural Philosophy at University of Edinburgh due to John Leslie's illness.
Sights bright patch on moon; asks JH to confirm the observation.
Unable to spot Biela's Comet. Outstanding observing conditions allow WS to sight normally difficult objects. Makes suggestions concerning JH's rotating roof plans.
Sends micrometer observations of stars suggested by JH.
Sends Gamma Virginis observations. Devotes time to nautical astronomy; experiments with formulae for calculating occultations. Takes interest in eclipse of Jovian satellites.
Has been making optical experiments. Hopes to see JH in the Spring. Hopes JH will be able to observe Encke's comet this year.
Will he be visiting Cambridge this Spring?
Observations on the various ways of measuring angular positions (of double stars). Opinion on JH publishing his catalogue of nebulae. Remarks on the low standard of astronomical observations in England compared with the Continent.
Observations on the gravimeter.
Requests that the engravings for the catalogue of nebulae be speeded up. Further observations on the gravimeter. Observations on W. R. Hamilton's experiments on biaxial crystals using A. J. Fresnel's wave surface theory.
Requesting a copy of G. A. A. Plana and Francesco Carlini's 'Lunar Theory.' Further remarks on the practicability of the gravimeter.
Wants information for the journal. Apologizes for the delay in writing the letter.
Thanking him for sending the Memoirs.
Has asked L. F. Debure to send to JH the third volume of the Memoirs of the Foreign Correspondents of the Academy of Sciences.
Has just heard of the death of Lady Herschel. Will be at Slough for the funeral on Friday.
Regarding the situation on the Cape of Good Hope. Is sending a paper of Dr. [William?] Henry. David Brewster suffered last Thursday.
Regarding the results of the Finsbury election. Has been invited to a public dinner and would like him to come, together with some of his scientific friends. Part of his machine is ready.
Is delighted that JH is coming to dinner.
The postal packet that he forwarded to Durham has been lost, so would be grateful if JH would send him another recommendation. Must not speak too humbly of himself. Finds Cambridge much changed.