Must decline invitation to dinner due to poor health.
Must decline invitation to dinner due to poor health.
Wonders how JH's projected volume on Astronomy is progressing. Would also like a short biography of Francis Bacon.
Discusses study of light, JH's theories on the subject, and his own photometer observations. Asks JH for further explanations of his theory.
JG is revising his diary.
Has received the chronometer and will return it to Lister, together with his remarks on apertures. Charles May has found another individual suffering from color blindness. A friend has successfully made a reflecting microscope.
Wilhelm Struve's observations support JH's findings concerning the rapid revolution of Eta Coronae. In acknowledgement of the discovery that double stars are a 'revolving binary system,' JH changed the inscription on William Herschel's monument.
Reminds JH to send his catalog of double stars.
Passing on the offer of assistance by Frederick Augustus (Duke of Sussex) for JH's projected visit to the Cape of Good Hope.
Responds to RP's concerns about the nature of light and the interpretation of some interference experiments. JH believes that the undulatory theory of light is the best supported by the experiments at this time.
Discusses a method of separating iron oxide from the oxides of other metals and a process for the purification of uranium oxide.
Is grateful for the offer of assistance from Frederick Augustus (Duke of Sussex), but would not care to avail himself of public funds as his intended visit is for his own private reasons.
Sends letter, inspired by J. von Liebig's paper on separation of metallic oxides, to Annales de Chimie et de Physique. Fears JH's scientist friends may fall victim to the 'terrible malady...now raging' [in Paris].
JH's notes on separation of iron oxide and a new procedure for complete purification of uranium.
Will he be visiting Cambridge this Spring?
Encourages JH to undertake a proposed trip to the Southern Hemisphere [letter completed 1832-5-1].
Is trying to clean up JH's nebulae observations preparatory to leaving for the Cape; comments on communications from F. G. W. Struve about double stars.
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.
Will observe transit [of Mercury] hoping it will provide good meridian data. Encloses sketch of telescope in Bedford.
Regarding instructions for James Dunlop at Parramatta Observatory. Richard Copeland has been reappointed to the Meteor, now renamed Beacon.
Is proposing to visit the continent after the Oxford meeting to make observations and intends taking some meteorological instruments. Would like JH's advice on some points regarding the large thermometer filled with a blue liquid.