Concerning GA's eclipse lecture and [G.] Seyffarth's claims regarding eclipse observations.
Showing 121–140 of 186 items
Concerning GA's eclipse lecture and [G.] Seyffarth's claims regarding eclipse observations.
Results of observation of transits at Greenwich and Paris.
Requesting comments on enclosed papers concerning Greenwich Observatory.
Is sending his speculations on the attraction of mountains.
Requesting advice on his reflex zenith tube. Regarding progress on 'Standards.'
Now believes that at least one specific weight should be acquired [see GA's 1851-9-29].
Wants one or more of JH's actinometers. Notes his suggestion about the zenith tube.
Relating his experiments with the zenith tube.
Has procured an actinometer and would like details of the scale.
Relating his experiences on his recent tours abroad.
Regarding P. S. Laplace's barometric measurements. Michael Faraday.
Note accompanying forwarding of a paper by Otto Struve, and other minor matters.
Regarding errors in Francis Baily's tables.
Regarding orbits of comets. Lunar elements JH requires are given in P. A. Hansen's tables.
Regarding a possible successor to U. J. J. Leverrier at the Paris Observatory.
Regarding an observer for the forthcoming eclipse.
Encloses copy of a letter addressed to GA from Toronto University (dated 30 October 1858 and stating that the Toronto Observatory has not been closed in spite of what the R.S.L. and B.A.A.S. joint committee have stated). Difficulties because of Edward Sabine's illness.
Wants information for the proposed visit to Auvergne. Regarding the motion of the sun.
Relating to his holiday experience in France.
Regarding the geographical position of places in France. Comments on JH's paper on light and colors.