JH must write official letter to Admiralty stating completion of [Cape of Good Hope] telescope and explaining reason for additional £170.
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JH must write official letter to Admiralty stating completion of [Cape of Good Hope] telescope and explaining reason for additional £170.
Regarding spots on the sun and [T. J.?] Hussey and [A.?] Dawson's observations.
Gratitude for receipt of JH's Cape Results. Owning no instruments, EH appreciated JH's chapter on 'naked eye' astronomy. Notes and drawings of variable stars.
Concerning P. A. Hansen's observations of Lunar irregularities.
Has found that Orionus is a double star. Compares William Lassell's and Wilhelm Struve's observations of various stars.
Sending something from Airy relating to the testimonial. Anything he does not use can be returned to Somerset House for AD.
As JH has accepted the superintendency of the Admiralty Manual he will try to undertake the geological part, but it will take time as he is busy on another project.
Undertakes to write geological part of Admiralty Instructions [A manual of scientific enquiry (1849), Collected papers 1: 227–50]. Has doubts as to his success.
Has performed experiments measuring the deviation of spectra through an obliquely placed diffraction grating. Believes they strongly support the wave theory of light.
Received yesterday JH's receipts for payment of Cape telescope. Forwarded these to accountant general of Navy.
Informing him of the recent death of Mrs. Lestock Wilson.
Has been carrying out researches on the reflection of light. Would like JH to communicate his paper on this subject to the R.S.L.
[P.S. on verso of cover. Rest of letter is missing.] Notified Mrs. Knipping of kind wishes sent by JH and wife. Will notify JH when personal effects of Caroline Lucretia Herschel have been inventoried and distributed according to JH's directions. Questions fate of [telescope] given to [J. F. L.] Hausmann by Caroline Herschel now that Hausmann is dead. Suggests donating it to observatory at Göttingen or to 'Archiv' in Hanover.
Thanks JH for the gift of a copy of JH's Cape Results, and admires it greatly.
Informs JH that JH has been made an honorary member of the Physical and Natural History Society of Geneva; the Society thanks JH for a copy of his Cape Results. Comments on F. V. Mauvais's discovery of a comet and on the illness and death of Caroline Herschel. Will send comments on some of JH's astronomical work later.
Paid £5 into JH's account at Drummond's Bank today.
Arrangements for a meeting with JH.
Financial matters are dealt with relating to the purchase of a telescope [for Royal Observatory, Cape of Good Hope].
Sends the pamphlet by W. Snow Harris on lightning conductors. May find some extracts useful for the Admiralty Manual. Also extracts from William Reid and Mr. Liddington's work on hurricanes.
Leopold Gmelin's Handbuch der Chemie contains all JH requires. If he does not have access to it will send it to the R.S.L. for him.