R.S.L. committee recommends continuing three magnetic observatories at Falkland Islands, Newfoundland, and Vancouver Island.
Showing 61–67 of 67 items
R.S.L. committee recommends continuing three magnetic observatories at Falkland Islands, Newfoundland, and Vancouver Island.
Forwarded JH's letter of 8 Aug. 1858 to members of magnetic committee, who will respond before B.A.A.S. meeting in Leeds next month. Asks that both committees meet jointly on first day. Edward Sabine is willing to superintend new series of observations proposed by JH.
Sends procedures for preparation of the report of the Magnetic Committee for the meeting of the B.A.A.S., which JH cannot attend due to illness; asks some questions about achromatic lens theory.
Thanks HL for the response to JH's queries [see JH's 1859-9-4].
Writes to ask for clarification of HL's views on the dispersion of light.
Has not seen the paper in the Smithsonian Institution, but believes the author is in error. Has looked at A. L. Cauchy's Dispersion Memoir, but thinks Baden Powell's paper presents a more distinct formula. Hopes to send in a few weeks the first volume of HL's [Observations Made at the Magnetic and Meteorological Observatory at Trinity College, Dublin].
Comments that A. J. Fresnel's papers in the Annales de chimie are really incomplete sketches of theories, which he developed later. Theory clearly stated in [Felix] Billet's Traité d'optique physique. Friend of his at Trinity College has produced a peculiar liquid.