If enclosed item is accepted for publication in Photographic News, JH wants to inspect its press, especially 'as respects the Cipher,' and to receive 25 copies.
Reports on G. B. Airy's analysis [R.S.P.T., 153,. 617-] of 177 magnetic storms.
Asks that consideration be given to 'wishes of the Cadet' in selecting a regiment for him.
About geodesic books and JH's encouragement to John to keep asking questions; indeed JH is almost insistent on son John's writing to JH with questions, book needs, and confidences. JH also talks about finding the arithmetical mean of a number of observations. [Also included is the 1st page of a letter to John from one of his sisters.]
Encloses copy of JH's essay entitled The Yard, the Pendulum, & the Metre... (1863). Speculates on causes for deviation in pendulum measurements. Recommends using torsion gravimeters in 'proposed operation.'
In response to the gift of a book, JH comments on the philosophy of knowledge, and goes on to say that JH agrees with [John Stuart ?] Mill's rejection of the syllogism as a means of argument. In the postscript, JH comments on the nature of heat.
Received JH's two letters acknowledging receipt of 'Volume of Tables of Heights' of the Great Trigonometrical Survey of India. Hopes to visit JH and discuss phenomenon of terrestrial refraction. Received valuable assistance on tables from JH's son John.
Correspondence relating to the fall of a meteorite in South Africa on 13 Oct. 1838, and the provision of samples from Thomas Maclear by way of JH. [Letter illegible in parts.]
Discusses aspects of JT's new book [The Great Pyramid], especially its front matter.
Sending photographs of moon's surface.
Replies to opinions of astronomers [regarding moon's influence on weather]. Still waiting to hear from JH's son Alexander whether microscopists have searched for foraminifera in meteorites.
Poses question of sun's differential gravitational attraction on opposite sides of earth, inspired by JH's article ['Sun,' 1863] in Good Words.
Note accompanying report on paper by G. B. Airy.
G. B. Airy's paper has been received at R.S.L.
At request of William Crookes, JS [editor of new Quarterly Journal of Science] invites JH to submit original article on sunspots. Promises liberal honorarium . See article on sunspots by C. A. F. Peters in Zeitschrift für populäre Mittheilungen aus dem Gebiete der Astronomie und verwandter Wissenchaften.
Encloses copy of C. A. F. Peters's article in Zeitschrift für populäre Mittheilungen aus dem Gebiete der Astronomie und verwandter Wissenchaften. Please submit JH's article on sunspots by February. Audience of Quarterly Journal of Science are 'intelligent students of other branches and intelligent laymen.'
RC's book [Observations of the Spots on the Sun] is done. First copy, exhibited at R.A.S. last week, was well reported in R.A.S.M.N. Will send copy to JH.
Thanks JH for solar observations. Discusses 'willow leaves' observations made at Greenwich Observatory after following JH's suggestions for solar eyepiece.
Argues against JH's position that weather forecasts cannot be made for more than 48 hours in advance.
Responds to GS's 1864-1-16.