Will invite G. A. Erman to act as B.A.A.S. commissioner in reduction of 1829 Gaussian constant. Will try to remedy misconceptions of G. B. Airy. T. M. Brisbane will not get involved. Testing new magnetic instrument by Humphrey Lloyd for Arctic expedition. Invite C. F. Gauss to Cambridge.

Received thirteen replies to JH's circular; nine remain unanswered. Suggests printing these, before they are published by B.A.A.S, and distributing these along with second circular by JH.

Letter to accompany a gift of part of FB's latest work on psychology and knowledge, urging JH to encourage England to study psychology.

Gives detailed, official, replies to the questions in the magnetic committee circular [see JH's 1844-12-5].

Asking him to read GA's medal-speech.

Discourages the continuation of the magnetical and meteorological observations organized by the British.

James Basire to proceed with copper engraving of JH's 'Chart plate.'

Received JH's directive to send dividend to Mary Ann Hollier. Other money is invested in property at Cardiff, owned by Mr. Hollier. CB in bad health. Questions authorship of Vestiges [of Creation].

Illegible.

Has been appointed keeper of Mining records at the Museum of Economic Geology. Hopes to meet him personally and thank him for his assistance.

Discusses meetings of B.A.A.S. Describes [Robert Chambers's] Vestiges of Creation as a 'singularly shallow work.' Asks various astronomical questions of JH. Says the author misunderstands P. S. Laplace and Auguste Comte. AS is quite harsh in criticism.

Asks various questions about P. S. Laplace's nebular hypothesis and about Auguste Comte's discussion of it. AS comments: 'Your Father and you have given ample materials for observations for a 1000 years to come.'

H. U. Addington will send JH's letter to Clemens von Metternich via Robert Gordon, English minister to Vienna. JH may include George Peacock's signature also. Printer will send proofs of replies to JH's circular to JH for corrections. JH's estimate for expenses for observatories is too high. Sent copy of JH's circular to Charles Wheatstone.

Thanks for JH's certificate concerning AS's battery, now finding increasing support.

Asks JH to accept a paper EA has written.

Published opinions on magnetic and meteorological survey should be restricted to correspondents who were directly involved in observations, particularly foreign participants. Most others may express their views at B.A.A.S. meeting in Cambridge. Recommends omitting M. F. Maury's letter and including that of J. M. Gilliss.

Sends specimen of esculine, or polychrome, extracted from horse chestnut. It exhibits optical properties that JH recently investigated. Offers to send specimen of colophene. Asks JH's recommendations for foreign secretary of R.S.L., following death of J. F. Daniell. This officer must supervise magnetic and meteorological observatories. [JH annotation: 'By all means appoint Sab(ine).']

Will direct JH's 14 Apr. letter to Prince Metternich.

Asks JH's opinion on a paper on magnetism by Karl Reichenbach, which has some 'very extraordinary' statements.

Comments on the various responses to the circulated questions about magnetic observations [see JH's 1844-12-5].