Packets will be sent Saturday by Smith, Elder & Co., so that the one for [Caroline] Herschel will not be late for Mr. Köhler.

Requests answer to JP's earlier letter. Observations of photospheres around planets and satellites.

Has received JH's note, and JF will visit JH next Wednesday, accompanied by D. F. J. Arago and [C. L.] Mathieu.

Please recommend London instrument makers to supply new Edinburgh observatory. Josef Fraunhofer was asked to make only lens for transit instrument, but wants to make entire instrument. [JH annotation: Recommended Fraunhofer for entire transit instrument and Robert Molyneux for clock.]

Repeat computation for Jupiter's satellite IV [see TY's 1824-4]. Explains W. H. Wollaston's 'blue bow.' See figure 422 of TY's [Lectures on Natural Philosophy].

As R.S.L. vice president, JH should reconsider his report favoring Eilhard Mitscherlich over W. H. Wollaston. This may be last opportunity to pay Wollaston a 'just compliment.' Agrees with JH that much in R.S.L. 'nicknamed science [is] sleight of hand,' and that 'great injustice is done to men of science.' But TY expects a short life and tries not to be concerned about approval of others.

TY would rather have JH's labor made useful another year. W. H. Wollaston does not want [Royal] medal, but medal wants Wollaston. One council member felt that TY's remarks offended JH. Assures JH it was not intended.

Math is flimsy in John Dalton's theory of vapor dispersion, but physical grounds are firm. Sends copy of TY's volume on sound. Modules of elasticity and tension are analogies to explain TY's doctrine. Presently studying modules of elasticity that do not apply to chimney pipes investigated by Daniel Bernoulli and J. H. Lambert.

JH is correct, and TY's 'little man is wrong.' Moon's apparent angular motion increases as spectator moves closer.

Acknowledges receipt by Jameson & Aders of Astronomical Society's 1824 gold medal, to be delivered to J. F. Encke in Gotha. [JH annotation: Encke confirmed receipt of medal.]

Sends notes on a paper which are to be submitted to James South. Also included [?] are copies of the paper for JH. Attached is a note by JH about the papers of JH's father, William.

Writing to JH [then travelling in Europe], JS informs him that JS is moving to Paris. Comments on his plans for his observatory in Paris and on recent events in England regarding astronomers and instruments.

Feels he has pledged to the public to continue double star observation. Encourages JH to persevere as well. Offers JH use of his 5-foot refracting telescope. Asks about Fraunhofer telescopes.

Reports on his life in France and on details in the paper JS and JH were publishing on double stars.

Thanks for his election to the Astronomical Society and for the award of its gold medal. Sends a proof of a new chart of the moon by W. G. Lohrmann. Sends two papers of his own. Hopes to send notice of John Pond's comet orbit in 1825.

Finds no errors in JH's letter on the parallax of Mars. Sends his own calculations. Has not found the barometrical readings JH requested.

Has heard that JH has arrived back in England. Sends one of his own papers for his library. Regrets that JH did not call at Paris on his travels. Sends a parcel from P. S. Laplace. Remember him to Charles Babbage.

Sending copies of his Éloge on William Herschel, and requesting some information regarding his publications.

Sending papers published by their Academy. Will be pleased to help in any way.

On JG's concern for JH's well-being.