About the barometric formula for the measurement of heights.
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About the barometric formula for the measurement of heights.
Of course JH is right; regrets he gave him so much trouble. Hopes his own construction of P. S. Laplace's atmosphere is correct. Hopes JH's daughter had a prosperous journey.
JH's conjectures are natural but Augustus De Morgan had nothing to do with JL's Treatise on Probability. JL wrote it in conjunction with J. E. Drinkwater Bethune, although the title page does not show the names of the authors. Understands what JH means about the moon but cannot see what will be gained. Sorry to hear of JH's mishap.
Can he recollect the origin of Table V in the Report of the Committee on Meteorology showing the elastic force of aqueous vapor? James Apjohn says JL calculated it but JL has no recollection. JL's mother is in a hopeless state.
Many years ago JH questioned him about the calculation of the perturbations in an inclined orbit, the satellites of Herschel [Uranus] for example. Has only recently seen the light. Is now confident that he can calculate the perturbations of any planet in any orbit. Gives details and would be glad of JH's comments.
Has received the books. Began with Karl Holtzmann's and finds the reasoning at fault. Comments on this. [Marked 'not sent.']
Asks JL to take on the preparations for the magnetic observations, including the instructing of ships' personnel.
R.S.L. business about an observatory at the North Cape in Sweden.
Comments on a paper on the calotype by W. H. F. Talbot, adding some experiences of his own on the subject.
Comments on Louis Daguerre's work, and on the question of a North Cape observatory.
Comments on balloon ascent report, photographic paper made with vegetable colors, and the need to provide a polarizing crystal to J. B. Biot.
Comments on JL's improvements to planetary theory.
Arrangements for JL's presentation to be made to the R.A.S.
Is sending a letter of support for a neighbor for the position of commander of constabulary about to be established in Kent.
Has received JL's memoir on the tides. JH would like to amalgamate certain portions with a memoir from William Whewell. JH adds some comments on photographic experiments he has made.
Has just done photographic experiments using bromine paper, and is very pleased with them. JH notes in a postscript that he had just received a letter from W. H. Fox Talbot stating that Fox Talbot had just discovered bromine paper as well.
Believes that R.S.L.'s request for £3000 grant to establish permanent magnetic and meteorological observatory is too hasty. Urges caution. Points out potential problems.
Explains JH's objections to JL's shadow-extinction hypothesis of meteors. Believes that several sorts of meteors—magnetoelectric, stony, vaporous, etc.—exist.
J. T. Boileau and L. E. O. Ludlow were appointed by H.E.I.C. to direct Indian observatories. R.S.L. is concerned that it has no choice in selecting directors. Instruments for H.E.I.C. observatories. Should JL request additional staff for all 16 observatories, or only for nine permanent ones?
A circular letter to the electors of the University of Cambridge, asking for their support in the upcoming poll for representative to Parliament [see JH's 1832-11-30].