Asks GA on behalf of F. W. Bessel, for unreduced positions of a star that FB wishes to examine for annual parallax.
Apologizes for confusion about F. W. Bessel's request [see GA's 1843-6-6], but JH had neglected to check date on FB's letter.
Is expecting to be summoned to Slough, about repossessing JH's [and William Herschel's] old premises; this will affect JH's availability for a meeting [see GA's 1843-6-24].
Finds GA's measurements of Gamma Virginis far away from JH's own, and instructs GA in the best way to measure double star positions.
Has received a request from the Admiralty to order a new telescope for the Cape observatory; at the same time, JH has received an unsolicited offer of a lens. JH seeks advice and information from GA.
Regarding custody of the Standards.
Makes some suggestions about possible storage places for the United States' standards [see GA's 1843-9-9].
No summary available.
Gives formula for defining the measure of the scale of an actinometer.
Recommends buying optics for 7.5-inch telescope from Metz and Mahlers in Munich and having those mounted in London.
No summary available.
Urges doubling number of lunar observations.
Would support improvements, both in number and quality, of lunar observations at the Royal Observatory; current practices produce unacceptably large predictive errors.
Will try to attend meeting called by GA, although JH is plagued by rheumatism; comments on the periods of Saturn's satellites.
No summary available.
No summary available.
No summary available.
Has not heard from Thomas Maclear [see GA's 1844-3-12]; has the Cape equatorial object glass been dealt with?
Comments on the large number of stars identified in one square degree of sky.
No summary available.