Would like to borrow the drawing of Josef Fraunhofer's telescope. Has received an account of this telescope from Wilhelm Struve, which he is now translating. Regarding the miscarriage of the Memoirs for Struve.
Would like to borrow the drawing of Josef Fraunhofer's telescope. Has received an account of this telescope from Wilhelm Struve, which he is now translating. Regarding the miscarriage of the Memoirs for Struve.
Forwards a specimen of his cobalt. Gives price and the various methods of use and refining. Thinks the analysis did not show its true qualities. Would like to hear the results of JH's experiments.
Pleased JH liked his paper on differential photometer. Discusses apparatus for experiments on light. Describes some papers he has written and some he is writing.
Edward Sabine's and JH's memoir on the differences of the meridian between Greenwich and Paris. Hopes to print a notice of the same operation with similar results. Operations last year between Paris and Brest were not a success so hopes to repeat them this year.
Wishes JH a happy birthday. Finished the catalogue of 2500 nebulae.
Thanks for information on the R.S.L. barometers. Would he purchase various instruments for the new observatory. Notes on star readings.
Is helping another scientist bring to publication a work on triangulation in the Alps. Comments on JH's idea of suspending an extremely long plumb bob at a particular precipice in the Alps [Foucault pendulum?]. GP does not believe the results would warrant the expense. Comments on the floating collimator [see JH's 1825-1-14], noting that he does not find it very helpful.
Explains the layout of her recently completed catalogue of 2500 nebulae.
Is sending a copy of Wilhelm Struve's paper on Josef Fraunhofer's telescope. Regarding F. W. Bessel's formula on longitude. Has copies of J. J. Littrow's paper for him.
Is grateful for being elected an Associate of the Astronomical Society. Compares barometers. Grateful for comments on his pamphlet. News of expedition up Mont Cuccio. Local disputes regarding the results.
Invites JH to dinner Saturday to meet J. G. S. Van Breda.
Shares JH's doubts whether the Board of Longitude will fund the Teneriffe expedition, the importance of which he again stresses. Cannot personally cover the costs. Thanks JH for his support and praise.
Clarifies issues discussed in an earlier letter. Discusses whether the project of making meteorological observations will be feasible if the Board of Longitude does not offer financial support. Attempts to arrange a meeting with JH.
Illegible.
On the eloges of William Herschel being prepared by François Arago and J. B. Fourier. JH's and JS's work on double stars much appreciated among French astronomers. On Alexis Bouvard, Arago, and other French astronomers. On Wilhelm Struve's observations of double stars.
Encourages JH to bring ES's proposal for Teneriffe experiments before the R.S.L. Council.
Anticipates appearance of JH's work on double stars; asks for suggestions for employment for a young man from Germany, and offers some suggestions about refining the study of refraction.
Something is going badly. Comments on volcanic action observed, and on having met some English acquaintances of JH. [Many parts of this letter illegible.]
On the transmission of materials between JH and JS. On their joint observations.
Election to the Astronomical Society.