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Has taken Mary Somerville's manuscript [On Molecular and Microscopic Science] to John Murray. Would like JH's opinion on the scientific value of her manuscript, and if he could assist her in seeing it through the press.
Regrets he should have felt so much anxiety about Maria (HH's wife and JH's daughter), but she is progressing well. Have settled down well in their new house.
Is writing an article on the life and work of George Boole and would like JH's advice on one of D. F. Gregory's references.
Has not had time to finish the George Boole paper, but the biographical part is in print. Will send him the complete article when it is finished.
Comments on analytic symbolism in mathematics.
Expresses thanks for RH, in a paper on George Boole in the British Quarterly Review, giving JH credit for having published 'my introduction of the mode of separation of the symbol of differentiation from the differentiated function and executing on it operations analogous to those of common algebra.'
Is grateful for the pamphlets on Standards and will inform him of any decisions made by the Committee. Comments on the various national standards and systems used.
Thanks for the parliamentary papers, which the Committee have found very useful. Will soon forward his report, which recommends the metric system.
Will give him great pleasure if he can assist J. Parkhurst in any way, but regulations in Messrs. Green's ships will preclude him from their service. Met Margaret Brodie Herschel at the Stewarts a few days ago.
Thinks that E. W. L. Tempel's comet may be connected with that of Biela. Comments on this.
Regrets his reply [to Hind's 1866-1-30?] is late owing to absence on an excursion. Has not heard that either comet has been perceived. Has not seen Otto Struve's remarks.
Giving observations of a new star observed by him and some of his correspondents.
Comments on new star reported by WH [see WH's 1866-5-18]; includes diagram of that portion of the sky.
Much obliged for his observations of June 1842. Probably the same star that is now being observed. Gives observations sent him by G. B. Airy.
Expressing the thanks of her mother for signing the memorial.
Found the enclosed in a bookseller's shop, found it amusing, and sends it to JH to explain the mystery.