Regarding the measurement of angles. Observations on a problem set by JH.
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Regarding the measurement of angles. Observations on a problem set by JH.
Regarding a telescope for Thomas Maclear.
Provides JH with information and advice about large lenses, which JH is considering for a Cape of Good Hope Observatory equatorial telescope.
Regarding the storage of the Standard weights and measures.
Describes some available glass discs, which might do for making lenses for a large refracting telescope [see GA's 1843-8-30].
Requires information on an actinometer.
Encloses copy of a paper for JH's comments. Regarding reviews of GA's paper on 'Tides.'
A notice of meeting of the Standards Committee, together with an indication of business to be conducted at that meeting.
Changes the date of a Board of Visitors' meeting and urges JH to be there.
Regarding glass for the telescope for the Cape Town Observatory?
Regarding electrometers and their efficiency.
Further regarding glass for telescope. Postscript relating experiments with electricity.
Has JH received Thomas Maclear's observations on Encke's comet?
Regarding Cape Town telescopes. Has written to Thomas Maclear for observations on Encke's comet.
Regarding JH's forthcoming visit to the Greenwich Observatory.
Further observations on object glasses.
Does not believe that a magnetic congress held at this time would be productive or representative; a better job could be done by letter.
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?