Regrets that he cannot attend B.A.A.S. meeting and stay with HL; thanks HL for his paper on the undulating theory.
Showing 21–29 of 29 items
Regrets that he cannot attend B.A.A.S. meeting and stay with HL; thanks HL for his paper on the undulating theory.
Begs not to be chairman of the proposed Magnetic Conference Committee [see HL's 1857-10-19], but would serve on the committee.
Passes on the suggestion, from G. B. Airy, of the use of copper rings for damping the movements of measuring instruments in measuring terrestrial magnetism.
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].
Sends to HL a sheet of curves laid down by [Charles] Riddell, comparing Brussels declination observations with those made in Toronto. JH frequently refers to HL's work on the subject of terrestrial magnetism.
R.S.L. committee for considering continuance of magnetic observations has recommended that hourly observations be carried out at Falkland Islands, Newfoundland, and Vancouver Island. Alternate stations are Ceylon and Bermuda. Will not print all observations. Hopes colonial governments will participate. JH and William Whewell will be at [B.A.A.S. meeting in] Leeds.
R.S.L. committee recommends continuing three magnetic observatories at Falkland Islands, Newfoundland, and Vancouver Island.
Writes to ask for clarification of HL's views on the dispersion of light.