Will observe transit [of Mercury] hoping it will provide good meridian data. Encloses sketch of telescope in Bedford.
Will observe transit [of Mercury] hoping it will provide good meridian data. Encloses sketch of telescope in Bedford.
Sends Gamma Virginis observations. Devotes time to nautical astronomy; experiments with formulae for calculating occultations. Takes interest in eclipse of Jovian satellites.
Sends observations of Gamma Virginis, which differ from those of WS and James South. Observed transit of Mercury. Has abandoned plans of going to Cape of Good Hope this year. Plans to visit Caroline Herschel in Hanover.
Returned from Hanover visit. Observed the star WS had discovered between 36 Ophiuchi and 30 Scorpii. Requests WS to observe a nebula in which JH has spotted a triple star. H. C. Schumacher is recovering from illness, while H. W. M. Olbers is very ill and not expected to recover.
Sends micrometer observations of stars suggested by JH.
Sends positions of Biela's Comet. Has much success with repolished telescope mirrors and collimator. Designs equatorial revolving roof for Cape observations; sends sketches. Compares WS's, W. R. Dawes's, and JH's observations of Gamma Virginis.
Unable to spot Biela's Comet. Outstanding observing conditions allow WS to sight normally difficult objects. Makes suggestions concerning JH's rotating roof plans.
As no one seemed to be finding Biela's Comet, JH sat up several nights looking for it and now has located it.
Sights bright patch on moon; asks JH to confirm the observation.