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.

Pleased that Astronomical Society will publish GP's memoir (in French) [see GP's 1825-5-27]. Adds some comments for clarification on points in paper and makes arrangements for copies of the paper.

Inquires about the arrival of the memoir sent by GP to JH [see GP's 1825-7-28].

Is very concerned because JH's recent letter did not comment on the arrival of GP's memoir [see GP's 1825-10-24]. Comments on printing and arrangements for copies.

Is pleased that GP's memoir has finally arrived in London [see GP's 1825-11-19]. Indicates arrangements for paying for copies. Comments on GP's astronomical observations of the last several years, and on his method of making reductions.