Provides JH with the measurements from a series of observations of Gamma Virginis.
Showing 21–40 of 42 items
Provides JH with the measurements from a series of observations of Gamma Virginis.
Provides JH with information and advice about large lenses, which JH is considering for a Cape of Good Hope Observatory equatorial telescope.
Describes some available glass discs, which might do for making lenses for a large refracting telescope [see GA's 1843-8-30].
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.
Sending copy of GA's 'Tides and Waves' for Encyclopaedia Metropolitana; would be glad of JH's comments. Also encloses his eclipse paper.
Answer to one of JH's on 9 January [apparently on equatorial telescopes].
Regarding William Cubitt (Engineer of the Dover Railway) and the proposed blasting down of the cliffs between Dover and Folkestone.
Further news of his proposed visit to Dover to see the blasting of the cliffs?
Regarding projected committee for the construction of new Standards for weights and measures. Any observations or further instructions for captain visiting the China coast?
Covering letter to one by Edward Cooper regarding appearance and observations on new comet.
Offers JH information about, and maps of, Switzerland, as GA understands JH is going there.
Regarding Captain [Charles ?] Gray's letter. Robert Peel has written asking Francis Baily and W. H. Miller to do the 'Standards.'
Regarding H. C. Schumacher and the Stephen Groombridge observations.
Regarding a letter from F. W. Bessel. On holiday on the Isle of Wight.
Regarding a meeting of the new 'Standard' committee.
Regarding the measurement of angles. Observations on a problem set by JH.
Regarding a telescope for Thomas Maclear.
Regarding the storage of the Standard weights and measures.
Requires information on an actinometer.