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Silly story asking 'what has become of JG?'
Replies to TH's 1829-2-16, giving details of observations. Have not been printed yet. Household in a state as they have just moved.
Has had a letter from Wilhelm Struve regarding the Standard. Could HK bring it to the notice of the R.S.L., and advise JH?
Has considered DL's request to the best of his ability and thinks that he will be able to write the preliminary essay in about six months' time. Regarding his friend Thomas Greenwood of the Inner Temple, will be able to put DL in touch with him.
Gives reason why he wishes to omit the F.R.S. from the title page. Gives layout of entry for the title page. Prints the slips into a book so would like them printed on one side only of the page.
Is ordering a pocket chronometer from Molyneux and Co. on behalf of Joseph Johann Littrow of Austria.
JH shocked by MB's note. Will tell Mrs. Moorsom tomorrow.
Wrote and asked F. L. Chantrey to write to MH. Baby Caroline is fine. Condolences as MH attends to sister Isabella.
Isabella Stewart's death seems imminent. Should JH bring baby Caroline to London for funeral? Mrs. Moorsom reports that Lady Mary Herschel needed help of physician Mr. Fowler. Baby is fine.
Thanks WS for excerpt from Niccolo Cacciatore's letter; comments on the awarding of medals for merit, and points out some necessary conditions which must be considered if the observations of the satellites of Jupiter are to be used in determining the constant of aberration.
Advises WS on best ways to make a 'darkening glass' for solar observations. Also suggests method for delineating sunspots. Hopes WS will attend Nautical Almanac meeting and support his points. Completes two telescope mirrors and observes Uranian satellites. Asks WS to look for a double star between Beta1 and Beta2 Capricorni.
Discusses WS's observations of double stars and method of averaging positional determinations. Believes he has verified the two Uranian satellites observed by William Herschel.
Thanks TH for some crystals, including borax, as well as a paper by J. J. Lister. JH has been cutting the borax crystals preparatory to grinding and polishing them; JH has used these crystals to observe a phenomenon previously seen with a mass of niter.
Admires her manuscript [Mechanism of the Heavens]. Wishes [P. S.] Laplace would have lived to see it. Notes a problem with the principle of virtual velocity.
Sends 40 pages of her manuscript [Mechanism of the Heavens] along with suggestions for improvement. Suggests clarifying the principles of the first chapter and a fuller explanation of various other principles.
Sends new translation of [P. S. Laplace's] Mécanique céleste. Says her revision [of MS's Mechanism of the Heavens] has been effective. Still doubts the derivation of the fundamental equation. Discusses force, resistance, and reaction with regard to this equation.