Encloses differences determined through indications of portable barometer, standard, thermometer, and various other instruments.
Encloses differences determined through indications of portable barometer, standard, thermometer, and various other instruments.
JH carried portable barometer by Edward Troughton and thermometer by Mr. Newman to Europe and compared these to instruments used by individual scientists and observatories. Reports results to Board of Longitude.
Has just returned from abroad and found his letter of April awaiting him. Hoped to visit Vienna when abroad. Has received money for the clock. Hopes to send his own paper on double stars later. Encloses some papers for distribution. Measured height of Etna when in Italy. Met Josef Fraunhofer and had an instructive discussion with him.
Charles Babbage communicated [Edward] Smedley's note requesting JH to write an article on 'Heat' and an Introduction to Physical Science. Appears to be some misunderstanding as JH does not wish to write on Heat, no interest in the subject, but is prepared to write on Physical Optics. When will the latter article be required?
Thanks TY for books and for taking charge of [G. A. A.] Plana's plates. JH mentioned Eilhard Mitscherlich only when no other proposals came forth. Matter was left hanging. Assures TY that JH was not offended [see TY's 1824-11-21, i.e., #1075]. Regrets 'dilapidated state of scientific matters' in R.S.L.
Praises old Edinburgh Philosophical Journal. Promises to send DB some materials for publication.
Reports on the reception of WW's crystallography paper at the R.S.L. Asks WW to add a comment on the paper's relation to a paper in David Brewster's journal. Asks WW to contact George Peacock.