Has been overwhelmed with work, which accounts for the delay in writing. Thanks for communications. Both are now printed. Comments on some of the points raised.
Has been overwhelmed with work, which accounts for the delay in writing. Thanks for communications. Both are now printed. Comments on some of the points raised.
Thanks for comments on JL's papers [see JH's 1828-7-24]; Charles Babbage had visited JL.
Is sending papers for the Astronomical Society Memoirs, on telescope lenses and the construction of telescopes, planetary observations, and the use of equatorial telescopes. Is anxious to see JH's writings on light and his nebulae catalogue.
JL was elected associate of Astronomical Society. Received JL's books and papers. Will send Society's Transactions. John Pond gave permission to test Robert Molyneux's clock at Royal Observatory. Questions F. G. W. Struve's transit determinations of double stars. Pond discovered errors in Greenwich transit instrument and places little dependence on its observations since late 1819. Sends John Brinkley's analysis [of April 1821 comet observed by Basil Hall in southern hemisphere]. Asks about Halley's Comet and parallax. Wants information on object glasses of 6-inch diameter or greater. Requests copy of JL's annual published observations.
Receipt and shipment of various papers and letters. Robert Molyneux has not received payment for clock. JH ordered another for L. A. Fallon; it is ready to ship. Clarifies Edward Sabine's remark about pendulums. Hopes to translate JL's Analytical Geometry. JH translated JL's 'empirical formula of refraction.' Believes JL's method of determining latitude without knowing the time is not new. Notes J. W. A. Pfaff's translation of William Herschel's works.
Thanks for the publications sent; lists materials JH is sending JL. Asks about quality of Josef Fraunhofer's large telescopes. JH read part of JL's letter of 2 Jan. 1822 at Astronomical Society meeting. Discusses proper motion of sun, JL's work on latitude of the pole star, observatory clocks, micrometers, and the Cambridge Observatory.
Discusses JH's efforts to send various publications to JL and to receive publications from JL. Hopes Franz von Gruithuisen, whose 'strange' lunar observations are causing controversy, will come to England with his telescope. Discusses JH's progress in preparing a catalog of nebulae.