Regarding spots on the sun and [T. J.?] Hussey and [A.?] Dawson's observations.
Showing 21–40 of 40 items
Regarding spots on the sun and [T. J.?] Hussey and [A.?] Dawson's observations.
Concerning P. A. Hansen's observations of Lunar irregularities.
Regarding the proposed eight-inch object glass. Supplementary estimate for the Admiralty. Extract of a letter from Otto Struve.
Regarding modifications for the actinometer. Has written to Georg Merz regarding the object-glass. Regarding the eight-inch object-glass. Name of the maker of his actinometer. [JH has written a rough draft of his reply to this letter on the same sheet.]
Georg Merz's practice regarding the sale of object-glasses. Is preparing a model of a transit circle.
Concerning object-glasses.
Concerning the new meridional instrument. Is JH coming to town soon?
Regarding the reinstatement of the zenith tube.
Further information on the zenith tube. Description of a zenith tube.
Regarding Mary Somerville's proposals for extraordinary terrestrial refractions—Admiralty Manual.
Asks JH for his opinion of F. W. A. Argelander's letter concerning the publication of his work by the R.A.S.
Concerning the eighth satellite. Observations on U. J. J. Leverrier's paper.
Queries regarding the perturbation sheets.
Encloses perturbation sheets for checking.
Has received further proof sheets of the perturbations from the printer. Regarding Isaac Newton's theory of the motion of the moon's apse.
Further regarding GA's defense of Isaac Newton's theory on the moon. J. H. Seyfforth's theories seem plausible. Ipswich Philosophical Society.
Regarding the annual equation of the moon's motion.
Regarding the annual equation of the moon's orbit.
Observations on JH's chapters [of Admiralty Manual?] received from the printers.
Comments on observational quality obtainable with the great telescope of William Parsons [Earl of Rosse].