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Received the enclosed silver plate on which is an impression made by the moon; has he any comments. Has been experimenting with solution of bichromate of potash and sulphate of copper exposed to actinic influence. Has been giving his attention to ferrotypes recently.
Has forwarded some of the late Professor Thomas Henderson's manuscripts to JH. An application may be made to the Government for a pension for the daughter. The books are to be sold and he will send a catalogue.
Wonders if JH could be persuaded to write a series of articles on meteorology for the Gardeners' Chronicle. If unable, could he suggest a suitable substitute?
Magnetic questions have been sent to foreign observers but not the British. Why?
J. F. Daniell informs JL that the table was calculated by William Galbraith. James Apjohn states everyone is in agreement that the absolute heat of steam is constant, but JL disagrees. Intends raising the matter of John Southern's experiments at the next meeting of the B.A.A.S.
Obliged by JH's letter. Would he let him know what he thinks of raising the matter of repeating John Southern's experiments. His own eldest son has gone to Langley; he shows little aptitude for figures but a decided turn for Natural History.
A copy of the question circular, signed by JH, sent to GA [see GA's 1844-12-17].
As secretary of Wernerian Club, CM requests information from JH on atmospheres of moon and planets.
Sent out copies of JH's remarks on Toronto actinometer. Expects that observations recommended by JH will be made next summer. Replacement for J. H. Kay's broken actinometer will arrive [in Tasmania] next June. Possible remedies to declination readings.
Mostly news of JH's family; JH inquires as to the state of health of JL's mother.