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.
Has too long delayed thanking him for his works. Sends some memoirs of Edward Sabine, etc. Comments on work that needs doing.
Sends the last volume of his Mécanique céleste for the R.S.L. Comments on his various activities. Is grateful for the memoirs JH sent.
News that he has been elected an Associate of the Astronomical Society gives him pleasure. Does not have much time at the present to devote to astronomy. Hopes to visit England to obtain materials for a life of Edmund Halley.
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.
About books and papers, being sent both ways.
Concludes original letter lost. Impossible to do any further work for the Encyclopaedia Metropolitana. Hopes FL will write the article.
Their letters have missed more than once, and JH's last letter is now at the Return Office. Would like to see this letter to learn JH's views on the article on Heat. Gives own ideas how article should be written, too busy himself, so hopes JH can write it, or does he know any other person?
Sending this note to inform JH that he began his own serpentine paper on Friday and next Friday intends to read JH's paper on Predazzo. Would like to go over the paper with JH beforehand. Intends to publish his own paper in Brewster's Journal. Can JH meet CL here Wednesday morning?
Believes that JH is acquainted with R. I. Murchison, who is to accompany CL to see the works of M. I./I. K. Brunel's Thames tunnel, after they have gone through JH's paper. Would JH like to accompany them?
Outlining his Italian travels after leaving Naples. Had to return home as business pressed.
Something is going badly. Comments on volcanic action observed, and on having met some English acquaintances of JH. [Many parts of this letter illegible.]
A notice of meeting of the R.S.L. committee to improve glass.
Sends JH a sketch of an experiment already made.
Acknowledging the letter of 25 Nov. informing GM that he has been elected to the R.S.L. Will attend at the earliest opportunity to be admitted.
Apologizes for the long delay in writing of JH's election into the Danish Royal Academy of Sciences. HO is carrying on experiments with chlorine gas and metals.
Mostly involves arrangements about exchanges of papers and printing some of GP's in the Astronomical Society Memoirs.
Apologizes for delay in writing. Describes JH's travels across Europe back to England. Is sending GP copies of JH's papers in physics, mathematics, and astronomy, especially double stars. Describes a new instrument, a floating collimator, described by Henry Kater at the R.S.L. [Rough notes for a later letter on the back of part of this one.]
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.
Is preparing a paper on planetary perturbations, which GP would like to send to the Astronomical Society for publication. Comments on JH's ideas on the subject of perturbations. Would the paper being in French be a problem? Comments on Henry Kater's method for finding the zero point in his meridian circle.