RH's experiments are extremely interesting and deserve to be pursued. Comments on experiments made by Michael Faraday and others relating to the formation of crystals in a magnetic field and the effect such crystals have on polarized light.

As JH has not heard from NS, he has arranged for Madame Gerlach to stay with Mrs. Mason, now living in part of JH's former residence at Slough. But under no circumstances can Madame Gerlach return to her duties with JH's family.

Is submitting a list of corrections for the astronomy section of the Cabinet Cyclopedia. Proposes a major new work on astronomy.

Sending by the bearer mirror No. 3 of which he spoke. Will exchange it for Troughton's if TH can make use of JH's. Do not attempt to clean Edward Troughton's mirror with acid. Hopes he does not feel obliged to carry out any particular series of observations.

Believes that rather than asking the government for more money to continue making magnetic observations, the six years of observations should be studied to see if further observations can be justified.

Replies to HF's 1845-1-12 that JH has no time to comment on HF's Britannic Censor.

Feels unable to become a member of the new society proposed by Halliwell, but wishes it well.

Will try to organize an international magnetic conference at the B.A.A.S. meeting in 1845, if GA agrees.

Having been assured by ES that the government might receive a request for more money for magnetic observations, JH retreats from his earlier position [see JH's 1844-7-17], and is willing to accept the possibility of a magnetic conference, which JH does not want to lead in any way. JH believes his scientific life is almost over and he has much to do.

Comments on EH's 'Magic pictures', which JH said he produced and described in a paper twenty-six years earlier; JH is however unable to explain the process chemically.

Informs HL of the intention of holding a magnetic congress at the meeting of the B.A.A.S. in 1845, and JH seeks HL's opinion.

Has not received Tables A and B of the endowment tables. Comments on the use of these tables and would welcome his views on a possible alteration in policy.

Replies to JH's 1865-5-16, expressing thanks for materials sent. Comments on temperature.

Thanks for the beautiful engine-turned patterns; they exceed in beauty anything he has seen before. Should think he would have no difficulty in polishing reflectors.

Comments on JH's disagreement with the nebular hypothesis of Auguste Comte, and points out to JM that JH disagrees with some of JM's writings on physical science as well.

Knows nothing of the enmity of Humphry Davy towards [John] Herapath. The purpose of JH's last letter was to point out that Herapath was in error in his solution of certain equations. Must consider correspondence closed.

Proceeds to show JM in detail that Comte's nebular hypothesis is arguing in a 'vicious circle' [see JH's 1845-7-10].

Encourages his son Willie to show that he deserves the favors WH has received from W. H. Sykes.

Is willing to have JM show Comte JH's letter of 1845-7-13, but not JH's 1845-7-16. The latter of these two was intended to show JM the nature of the argument from JH's perspective.

Returns with many thanks E. C. Hawtrey's translations from Homer and Kallinos. Both are beautifully done. Comments on these and the meters suitable for English ears.