Has been considering the reasons for the great depression of the barometer in November 1840. Thinks JH may be interested in the enclosed essay. Would be pleased if it could be read to the Royal Society.
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Has been considering the reasons for the great depression of the barometer in November 1840. Thinks JH may be interested in the enclosed essay. Would be pleased if it could be read to the Royal Society.
Explains 'discordances' as contraction of damp paper. Use 'Engraved Squares' to avoid this error. Possible error in barometer observations from Montreal. Diurnal 'undulation' appearing in data. American observations arrived, may fill 'missing intervals.' Keep record of expenses incurred. Postscript on color variation in stars.
Returning some papers that should have been returned earlier. Hopes all are well.
Encloses letter from G. B. Airy. Suggests new method of magnetic observation.
Has learned of the availability of a house at Kew, which could be used as a magnetic and meteorological observatory. Dr. Robinson has received the instruments.
Presents data on various disturbances. Awaits advice from C. F. Gauss. Discusses determination of intervals between observations. Mentions proposal to continue observations for 3 years.
A portable magnetometer purchased by the B.A.A.S. is now available as a loan for use in magnetic survey of British Guyana.
Will be happy to send particulars from [C. F.] Gauss's information. [Humphrey] Lloyd's instrument records changes in horizontal intensity best. Wants to employ magnetometers in New York.
A notice of meeting of the Standards Commission.
A note to accompany a draft of the report of the Standards Commission.
Sends JH a copy of draft report [see JH's 1841-1-20], and indicates procedure for coming meeting.
Regarding JH's telescope. Includes a rhyme on it.
Advice for standardizing observations, to be given to the Physical Committee of the R.S.L.
Has not lately done much work in photography, except to work with paper treated with vegetable substances.
It will be difficult for JH to get away to Collingwood as planned as discussions [?] are slow; some family news.
A notice of meeting of the Standards Commission.
Asks JH to put in writing proposals JH had made at a Standards Commission meeting, especially those relating to nomenclature [see GA's 1841-2-8].
A note to accompany proposals for the Standards Commission to consider [see GA's 1841-2-17]; twenty pages of proposals are appended.
Thanks and appreciation for past and present friendship.
Francis Beaufort will send JH sheets from James Ross covering trip from the Cape to Van Diemen's Land. Laments Charles Riddell's leave of absence but acknowledges replacement Lieutenant Younghusband's skill. States that C. F. Gauss has informed him by letter of the location of the south magnetic pole. Informs of [Edward] Belcher's letter concerning various magnetic stations in the South Pacific.