Regarding electrometers and their efficiency.
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Regarding electrometers and their efficiency.
Further regarding glass for telescope. Postscript relating experiments with electricity.
No summary available.
Has JH received Thomas Maclear's observations on Encke's comet?
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.
Regarding Cape Town telescopes. Has written to Thomas Maclear for observations on Encke's comet.
Regarding JH's forthcoming visit to the Greenwich Observatory.
Whether a repulsive force from the sun affects the tails of comets and thus the constancy of their orbits.
Arrangements about attending a meeting, together with some thoughts on the behavior of comets.
Regarding object glasses for telescopes. Relative merits of Munich and French object glasses.
Further observations on object glasses.
Will try to organize an international magnetic conference at the B.A.A.S. meeting in 1845, if GA agrees.
Does not believe that a magnetic congress held at this time would be productive or representative; a better job could be done by letter.
About a suggested magnetism conference, Francis Baily's illness, and some remarkable observations by F. W. Bessel.
Cannot explain why GA's letter did not reach JH.
Informing JH that he certainly wrote to him from Limerick.
Regarding F. W. Bessel's letter on the irregularity of proper motion in stars. Is it worth printing Nevil Maskelyne's observations on star places?
Urges GA to print any of John Pond's and Nevil Maskelyne's observations that seem free from serious error [see GA's 1844-8-28].
Expands on GA's proposed letter writing scheme in place of holding a magnetic congress [see GA's 1844-7-30].