About AD's health and the cold summer.
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About AD's health and the cold summer.
Received TW's book and approves simplicity and economy of its method of keeping time by using small fixed telescope to reduce star observations. Disapproves of using 'Dominical Letters.' Suggests using Julian dates.
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.
Glad for Mary's recovery. Congratulations on John's promotion to captain. Suggests method to study solar prominences without spectroscope. [Letter continues 15 June:] Alexander Herschel reports that G. B. Airy tried this method unsuccessfully long ago, but JH is sure it will work.
Reports on paper [R.S.P.T., 159,. 575-] by [Thomas] Andrews on continuity of gaseous and liquid states of matter, believing it fit for publication.
Note to accompany an extract from JH's son John's letter, reporting on his observations of solar prominences.
Extended comments on John Herschel's [JH's son] observations of the spectrum of the solar corona.
Concerned about AD's health. Offers theory of the constitution of matter.
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.
No summary available.
Attached comments [not included] convey JH's views on MS's new manuscript [On Molecular and Microscopical Science, 1869]. Expresses reservations about MS's endorsement of current ideas of forces and their correlation and conservation.