Is very pleased with the results of WD's double star observations of Zeta Cancri, which William Stratford forwarded to JH.
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Is very pleased with the results of WD's double star observations of Zeta Cancri, which William Stratford forwarded to JH.
Suggests an improvement in measuring techniques for astronomical observations, by making the angular measurement by direct and then reflected vision. JH wonders whether this idea might be appended to a paper currently under consideration by the R.A.S.
Discusses a variety of observations related to double stars, and asks FS to make some specific observations to compare with JH's work. Reveals JH's dream of going to the Southern Hemisphere for a number of years, but asks FS to keep it quiet, as 'many ties' stand in the way.
Comments with great satisfaction on WD's observations, and their close agreement with JH's for many of the same double stars.
Has determined the periods of four double stars. JH considers the determination of the elliptical orbits of double stars as 'one of the greatest [discoveries] ever made.'
Is sending WW a large collection of writings on optics and light.