Informal request for JH to write biography of W. R. Dawes for R.A.S. Recent marriages in CP's family.
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Informal request for JH to write biography of W. R. Dawes for R.A.S. Recent marriages in CP's family.
Searches for asteroids. Measures double stars and variables; Alexander Herschel assists. Asks JH's opinion of parallax measuring methods. R.S.L. funds offered to M. J. Johnson's family in his memory.
Asks if JH anticipated the results of W. L. Newman's work on lens curvature.
Informs JH, Charles Babbage, and James South that they are the surviving original members of the R.A S. Requests JH write an account of the R.A.S.'s founding. Discusses the evidence of the 'personal will' of God in creation.
Requests JH's reflections on the deceased Wilhelm Struve. Discusses making of telescope object glass. Continues work on the optical tables.
JH to visit CP's house. CP suggests they both visit J. P. Gassiot, where they might also meet with Michael Faraday. Asks JH if there are experiments he would like to see during visit. Reports observing Fraunhofer lines through a prism.
Warren de La Rue observes 'willow leaves' [mottling on solar surface]. Diagonal solar eyepiece works with great success. Praises de La Rue's work as having astounding accuracy.
Receives object glass from Munich for double star observations.
Praises JH's Iliad. Asks R.S.L. for funds to cover expenses incurred by spherical observations. Details information to be included in optical tables.
Suggests remedy for bronchitis problem in JH family. Young John Herschel's work on nebulae pleases CP. Comments on William Huggins's work on solar spectra.
Congratulates JH and Margaret Herschel on birth of a daughter [Francisca?]. Asks JH's opinion of the ideas of 'lines of force' and 'lateral shakes.' Conducts a force experiment with J. P. Gassiot.
R.S.L. approves of CP's optical work, believing it will be helpful at observatories abroad. CP comments on Alexander Herschel's prism experiments.
R.A.S. wants JH to direct the preparation of William Herschel's catalogue of double stars for publication. CP suggests Alexander Herschel prepare the catalogue with JH's supervision. G. B. Airy observes the 'willow leaves.'
Compares observations of meteor shower in Orion with JH. Describes methods and observations in detail.
Asks JH for information on the Beaufoy Clock owned by R.A.S., which is now missing. Requests JH to read R.A.S. Annual Report.
Has discovered William Herschel's memoirs in R.A.S. library; arranged and read them. Asks JH whether any copies exist so the originals can be checked for completion before binding. Questions JH on William Herschel's opinion of the nature of nebulae and boundaries of the galaxy.
Problems making actinometer observations during solar eclipse. Reports he did not observe the supposed planet Vulcan, but a fixed star. Sends micrometer observations. Describes shape of prominences.
Experiments with lens curvature and prisms. Wants to discover set rules for lens thickness-to-curvature ratio.
Forwards letter concerning 'solar bright particles' by W. R. Dawes. Inquires if diagonal solar eyepiece used in JH's solar spectrum observations.
Describes debate at R.A.S. over the nature of the 'willow leaves.' Different parties argue that the 'leaves' are solid, precipitate, or non-luminous gas.