Comments on JH's positive calotype. Suggests comet may be return of (J.-D.) Cassini's comet of 1668. Gives theorem for finding parabolic orbit of comet if two observations are made in the ecliptic.
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Comments on JH's positive calotype. Suggests comet may be return of (J.-D.) Cassini's comet of 1668. Gives theorem for finding parabolic orbit of comet if two observations are made in the ecliptic.
Announces election of Marquis of Breadalbane [John Campbell] as lord rector of Marischal College for coming year. Thanks for JH's advice to college senate.
WD's 1843 measurements for Gamma Virginis. Used crystal micrometer for all observations, to compare with parallel wire micrometer used in past.
Suggests modifying square base of JH's telescope to round base. Estimates cost at £80 to £100.
Refuses to risk GD's funds by giving cost estimate for unusual telescope, especially if R.S.L. expects GD to pay for any expenses over estimate. Regretfully stops manufacture of telescope.
The committee report on simultaneous magnetical and meteorological observations will be read at the B.A.A.S. meeting in Cork on 17 Aug.
Extract from observations of 70 Ophiuchi by F. W. Bessel. Results agree with WS's measurements by different method and increase WS's confidence. Hopes for more information on Gamma Virginis before finalizing WS's manuscript.
JH's theory of orbits of Castor and Gamma Virginis. Observations of Gamma Virginis by W. R. Dawes and by WS.
Problems with computation of Gamma Virginis.
Will send JH's report to JH in August. J. C. Ross will not be at Cork meeting, but JH may announce there that first year of Ross's observations at sea will appear in R.S.P.T.
Agenda items for next meeting of 'Committee for Superintending the Construction of Standards.' Compares English, French, Danish, and Prussian standards.
Commissioners of Treasury invite JH to join committee to oversee construction of 'New Parliamentary Standards of Weight and Measure.'
Thanks JH for his letters about the Cape equatorial instrument.
Provides prices and delivery times for a variety of different sizes of refracting telescopes, as well as some mounting advice.
About organization of the executive of the R.A.S.
A note accompanying a new book on etymology and requesting JH comment on it.
Thanks for JH's 1843-6-16.
Describes experiments in the electrochemical decomposition of metallic salts.
Further on the electrochemical decomposition of metallic salts [see AS's 1843-2-28], and its relationship to photography.
A new committee on standards is to be created to oversee the preparation and measuring of appropriate standard measures; seeks JH's opinion about asking Francis Baily and W. H. Miller to do the accurate weighing and measuring.