Received and corrected JH's magnetism [B.A.A.S.] report. Mentions interesting account by Dr. [Johann] Lam[ont] about a vertical force magnet used in Munich. ES read earlier letter from Heinrich Boguslawski proposing a special set-up of magnets. Humphrey Lloyd acknowledges it might be an improvement.

Actinometers for [Louis] Agassiz and John Caldecott are ready. Asks if JH wants to compare them to his standard instrument. Excessive magnetic disturbances in May were found simultaneously in Göttingen and Toronto, but the curves do not correspond.

Has requested John Caldecott to do what is needful to his own and [Louis] Agassiz's actinometers. Mentions great magnetic disturbances in June are not correlated in Toronto, Greenwich, and other observatories. Mentions proposal for correlation of observations between U.S. and Britain. ES leaves soon for Guernsey.

Consults JH before responding to Wilhelm Weber's proposal for publication of observations. ES proposes to publish German data with data from Toronto, St. Helena, the Cape, and Van Diemen's Land. The Physical Committee of the R.S.L. suggests strengthening Adolphe Quetelet's application to the Belgian government for magnetic observations. The Hammerfest [Norway] magnetic curve does not harmonize with European ones.

Has JH any special instructions for [Louis] Agassiz's actinometers? Has sent Wilhelm Weber recent data for Toronto and St. Helena observatories while requesting Göttingen lunar observations. Discusses publication of the German Magnetic Association. Seeks advice on the inclusion of a translation of JH's paper on photometric apparatus. Has left at the R.S.L. a copy of C. F. Gauss's and Weber's magnetic atlas.

Has received papers from Colonel Sykes. Describes (and includes a portion of) Lieutenant [Henry] Yule's report on broken instruments, which have prevented operations at Aden [?]. Suggests appointing a director there. Notes safe arrival of instruments at Toronto.

Encloses letter to JH on magnetic survey in Canada and two letters from Leipzig, as well as proposals for reforms in B.A.A.S. Hopes to meet JH at the upcoming anniversary of the R.S.L.

B.A.A.S. defers letter from [John] Washington to Magnetic Committee. Asks for JH's approval for funding [Robert] Schomburgk's portable magnetic observatory. JH should send Washington's letter to George Peacock. William Whewell, Humphrey Lloyd, and ES have contingently approved. Offers to order the appropriate instrument from Wilhelm Weber and seek partial funding from the Geographical Society. JH appends notice of his approval.

Encloses own copy of correspondence with Humphrey Lloyd and C. R. Fox about publication of magnetic observations. Mentions the affirmation of Lieutenant Younghusband in Canada. Will send the information to Charles Wheatstone and members of the Committee of Physics. Includes comments by Hew Ross and [Hussey] Vivian. Advises about cost of publication of data and sources for funding.

Encloses letter from Humphrey Lloyd, whose opinion of himself ES finds unpalatable. Asks for letter's return via Francis Beaufort.

Requests recommendations on the instructions proposed by ES for the magnetic expedition to Africa. Encloses meteorological observations by [Edward] Belcher, and other data related to magnetism in North America.

Relates arrangements for the magnetic observations at Lucknow in India. Proposes using Göttingen mean time for observations at Lucknow. Humphrey Lloyd relates that Captain Boileau has begun observing at Sinnlaw [Sikkim?] after preliminary moisture-related difficulties with the instruments. ES proposes solution. Charles Riddell reports safe arrival of magnets from Lloyd. Riddell and Lieutenant Younghusband approve of survey of the American possessions, but R.S.L. has not yet considered it.

Encloses letter from Mr. Meyerstein concerning the sending to England of a magnetometer with improvements introduced by Wilhelm Weber. Asks JH to arrange for the payment of the bill.

Discusses problem involving JH, George Peacock, Humphrey Lloyd, and Wilhelm Weber regarding the price of magnetometers. Also mentions reports of magnetic observations in Russia and at the Cape of Good Hope.

Asks JH's advice on the publication of various observations. Is also awaiting advice from Humphrey Lloyd.

Relates Humphrey Lloyd's complaint that JH sent Mr. Meyerstein's letter by mistake. Asks JH to forward [A. T.] Kupffer's letter along with those enclosed from Charles Riddell on the magnetism survey in America. Asks for JH's advice on the publication of the observations.

Assures JH that he will publish magnetic observations as JH desires. [Hussey] Vivian awaits the estimate of cost of publication. Encloses circular sent to the British magnetic observatories. Informs JH that the Niger and Guiana magnetometers have arrived safely. They should provide interesting comparisons with other observatories.

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.

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.

Congratulates JH on his latest child. Notes that data from James Ross show great disturbances at the Kerguelen station simultaneously with Toronto and Greenwich. Has sent various data to C. F. Gauss. Wilhelm Weber reports a new magnetic station at Havana recording by the British system. Notes Ross's dip data supports Gauss's theoretical expectations.