The yellow substance turns out to be pentasulfide of arsenic, with a slight excess of sulfur; comments on its properties.

Thanks for the photographic notes and for the remarks on color blindness. The remarks on the composition of colors interested him as he has difficulty in distinguishing shades of brown and green.

Sending two volumes of his own Cosmos. Regrets he did not visit him in 1857.

Thanks for his memoir on the projection of the sphere; it will be read at their meeting after next Monday. Up to their necks in the Yang-ste-kiang.

Thanks for the memoir on his ingenious projection. Now sends a short theoretical view of Robert Stephenson on the astronomical reasons for fossil plants in the Arctic regions. Would like JH's comments.

Sending the syllabus of the Government School of Mines, which should give JH all the information. Will be pleased to see him at the Museum if he has any further queries.

Thanks for fine basket of venison. Hopes that Lady Herschel is stronger after her visit to the North.

Sending a section of their new atlas of the world, which includes some new features. Would like JH's comments. Will send the complete work when published if JH would like to see it.

Response to JH's article on 'Sensorial Vision' (1858). Notes on physical and metaphysical elements of perception and consciousness.

Says that Council of R.S.L. will reconsider whether William Pole's paper on color-blindness should be published.

Comments on the effect of intensity of illumination on the distinctness of the spectrum.

Comments about reflective power of metals.

Further comments on subject of GS's 1859-11-10; comments on several experiments involving light and color.

Partial repeat of letter of 1859-11-10, together with some considerations about the molecular behavior producing fluorescence.

Announces funeral of Robert Stephenson.

JH appointed to a committee including George Wilson, David Brewster, Clerk Maxwell, William Thomson, and William Pole to study color blindness. They will be granted £10.

Returns JH report with one correction, substituting Kazan for North Cape, because [Christopher] Hansteen cannot find Norwegian observers. Will make copies of its final form and take one to B.A.A.S. meeting in Aberdeen. Mr. Bolyani has visited every magnetic observatory in Europe. 1854 was the year of minimum magnetic disturbances in Peking.

Sends Council report to be read next week. Instructed printers Taylor & Francis to accept any changes that JH may request. Sent copies of JH's report to Humphrey Lloyd and G. B. Airy. Gives ES's address in Scotland.

Sends copy of ES's reply to Richard Owen, who reported Owen's interview with C. E. Trevelyan. Suggests waiting until summer to apply for government funds to support observatories in Peking and Vancouver Island. ES's recent illness.

Received order for self-recording photographic instruments for magnetic observations from Mr. Bolyani, who plans to improve observatory at University of Kazan. ES quoted prices for making these in London and invited Bolyani to inspect observatory at Kew. ES now prefers Shanghai to Peking as site for observatory. Geographic distribution of global observatories. Reading JH's 'Physical Geography' [1859]. Sends two sunspot photographs from Kew.