Some comments and questions on mathematics.
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Some comments and questions on mathematics.
Sends copy of ES's memorandum to George Peacock describing progress in publication of magnetic and meteorological observations. Encloses copies of observations from Antarctic survey and Ceylon. Reasons for H.E.I.C.'s hesitation to expand survey by C. M. Elliott. Praises C. J. B. Riddell's book, which described portable magnetic apparatus that is now requested by observers worldwide. Recent changes in other instruments. Reimbursement for instruments provided to observatory in Newfoundland. Recent results of surveys on Continent, in Canada, and by Capt. Blackwood in Torres Straits.
Forwarded to George Peacock JH's letter of 11 Sept. Karl Kreil will send self-registering instruments that ES ordered for Kew observatory. Influence of vapor pressure on barometer readings. Introduction of hygrometers.
George Peacock returned JH's papers, with letter by Peacock. ES forwards these to JH.
Received letter from J. H. Lefroy in Athabasca [Canada]. Extract of C. J. B. Riddell's winter magnetic operations and summer plans along Red River.
Sends JH a letter from Thomas Maclear, in line with Francis Beaufort's instructions.
Left prints of Francis Baily for JH, and will send a pamphlet about a long standing controversy in which RS was involved.
About trying to convert some surveys to a base using RS's standard yard.
Having difficulty drawing the Great Nebula in Orion using both JH's and [Francesco] De Vico's observations; prints of Francis Baily are almost ready.
Expands on GA's proposed letter writing scheme in place of holding a magnetic congress [see GA's 1844-7-30].
A note accompanying a draft of the report on magnetic observations to date at British stations, and a circular to be sent out.
Discusses publication of James Grahame's [History of the United States of North America] revised. Includes circular describing Grahame, his project and the cost of the books.
Magnetic phenomena move in opposite directions in the northern and southern hemispheres. This contradicts a report made by JH. Asks permission to omit JH's statements concerning this issue.
Thanks JH for papers on light and photography. Enjoyed her visit to Collingwood. Feels privileged to be godmother to JH's daughter.
Attempts to determine light curve of Eta Argus; describes methods for determining magnitude. C. P. Smyth uses R.A.S. theodolite telescope. TM will triangulate Bushman Flat. Parallax work at Cape Observatory continues. Reports progress of new government Secretary, [John] Montague.
Hopes JH will write a memoir of Francis Baily.
Regarding the health of his aunt and other family matters.
Has just examined the area between Dublin, Paris, and Heligoland for waves. Self registering barometers would be useful.
His answer to the queries has not reached him; sends duplicate. Will receive Trans. of the Silesian Soc. Forthcoming map of stars and revision by JH. Does he require the observations of the meteorological terms be fixed?
Doubtless JH has heard of the death of the writer's cousin Francis Baily. There is a legacy of £1,000 due from Baily's estate.