Devises and suggests mode of micrometric measurement of angles.
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Devises and suggests mode of micrometric measurement of angles.
Reaches conclusion about Gamma Virginis. States in regard to shape of orbit, 'We are all wrong.' Believes the orbit is less than 150 years. Claims that many errors exist in British measurements made between 1829 and 1834.
Sends calculations of Gamma Virginis and determines its eccentricity. Believes the orbit is highly elongated, like that of a comet.
Sends JH's 1817 observations; cannot locate any he made in 1811. Tells WS Gamma Virginis measurements will take more time.
Sends diagram of the 'little sweeper,' which is now at Hanover with 94-year-old Caroline Herschel.
Will review all Gamma Virginis observations before revising orbit. Catalogue of major nebulae complete; will work on minor nebulae next.
Offers condolences to Ann Smyth. WS's calculation of Gamma Virginis orbit surprises JH. Concerned about accurate methods of calculation. Remarks on excavation of Chelsea mammoth.