Thanks for his communication regarding the reported changes in Eta Argus, and also Lieut. John Herschel's letter from Bangalore. These will form a valuable addition to the next R.A.S.M.N.

While in Switzerland requested his wife to send to JH a little tract on Count de S. Robert's hypsometrical investigations. Found that Robert's formulae worked correctly for ordinary European heights. Realizes that JH demolished Robert's theories, but Robert also showed observations on P. S. Laplace's theories.

Tyndall wishes to resign his lectureship at the Royal Institution. If Alexander [Herschel] would like this position, RM can recommend his appointment to the Governors.

Outlines the constitution of the Royal School of Mines. Now finds he has to consult other professors before he can recommend Alexander [Herschel] for a Lectureship.

Has heard from Mrs. Greig [wife of Woronzow Greig] that JH has consented to read the proof sheets of Mrs. Mary Somerville's work on molecular science. Sends the first 44 pages and would be pleased for any comments. Mrs. Somerville is in Naples.

Acknowledging the return of the proofs of Mrs. Mary Somerville's book. Is grateful for the revision and will forward the sheets to Mrs. Somerville for her to arrange and incorporate the suggestions.

Will be sending some Pyretheum roseum and some birdlime with instructions for their use. Wrote a few lines to JH's son.

Has received with great pleasure JH's obituary of their dear friend [William Whewell]. Such a clear account was much needed.

Accept his best thanks for JH's paper on musical scales. It seems to dispose of the whole matter in the most satisfactory manner. Hopes his own pupil is well.

This town and surrounding area were visited by an earthquake on Friday night. Gives time and details. Alexander Herschel is to give a lecture at Leamington in the ensuing season.

Remembers when JH introduced him to the Museum of Geology in Jermyn St.. Would like to exchange some rocks and minerals for some English fossils. Can JH advise him to whom to write?

[Printed notice] Invitation to meetings of 'Royal Geographical Society.'

[Printed notice] Ask election support for A. J. Beresford-Hope, representing Cambridge University.

Thanks JH for calling AH's attention to 'mischievous & preposterous metric measure bill.' Will work to defeat it [in Parliament].

Working on rejection of metric bill [in Parliament]. Grateful for information provided by JH.

Problem of Irish church has forced postponement of Parliamentary discussion of metric bill until 13 May.

Thanks for JH's notes on metric system. Will study these before Parliamentary debate on 13 May. Calculates that 63 percent of exports go to British possessions, while only 18 percent go to Continent. Sees this as argument against introducing metric system.

Why did French chose arc from Dunkirk to Barcelona as basis for metric measurements? Explain meridian lines. Why are linear metric measurements founded on arc, rather than on straight line? Criticizes William Ewart for introducing metric bill.

Death of William H. Barton.

Hoped to succeed late William H. Barton as comptroller and deputy master of Mint, but learned that government plans to make this office a political appointment. Seeks testimonial from JH on CS's behalf.