Please review TW's enclosed new book on civil time-keeping: How to Keep the Clock Right. [JH annotation: Answered 7 July.]

Was very happy to receive JH's remarks on his little logical work. Comments on this work. Is not satisfied with the logic of J. S. Mill. Has not seen [James] Haig's work yet, but hopes to read it on return from the Continent.

Extended comments on John Herschel's [JH's son] observations of the spectrum of the solar corona.

Thanks JH for his letter and package of his writings.

Cites various celestial appearances as a basis for concluding that the Milky Way takes the form, not of a disk or ring, but of a series of convolutions. Urges that the nebulae form part of the Milky Way rather than being separate universes, as many had suggested. Asks JH to critique these ideas.

Health is not good. Is not up to the theory of atoms. Have had broiling heat for many weeks.

A note to accompany a paper by FP on the prediction of occultations and eclipses.