Summary of research on terrestrial magnetism in other countries. Will send paper on magnetic storms to JH.
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Summary of research on terrestrial magnetism in other countries. Will send paper on magnetic storms to JH.
Sends sample sheets of magnetic reductions from continual observations photographed at Kew. Explains reduction formulas. Will send to JH new paper by ES on lunar diurnal variation. Carlo Matteucci reports interest by new government in Naples in reviving meteorological observatory there.
Asks JH to comment on ES's paper, which will be read to R.S.L. on 10 Jan. Corrects errors in two earlier letters to JH. Will adopt 'Photograms' instead of 'Photographs.'
Encloses description of Col. [J. T.?] Walker's experiments. Asks for JH's opinion of these.
Extensive comments on the type and construction of telescope to be supplied to Melbourne University.
Supports G. P. Bond of Harvard College for foreign membership of R.S.L.; proposes H. E. Sainte-Claire Deville for the Rumford Medal, for his development of a high temperature laboratory furnace applied to metallurgy and the 'disseverance' of the hydrogen and oxygen of water.
Opposes sending expensive scientific equipment for J. B. N. Hennessey to use in India; suggests instead a variety of useful observations needing to be made, using inexpensive equipment. Discusses son's [Alexander] spectroscope observations of meteors.
Further recommendations regarding useful equipment and observations to be made in India [see JH's 1866-8-11]. Agrees that meteorological experiments there are desirable. Offers JH's son John's experience of India to ES.
Informs JH that his comments against sending a major telescope to India were decisive [see JH's 1866-8-11 & 1866-9-4]; biggest cost impediment was salary of observer.
In response to ES's 1866-12-6, JH sees no benefit in a great equatorial telescope in India being an itinerant instrument.
Discusses Lord [Henry ] Brougham and his optical papers. Thanks ES for kind remarks regarding JH's son [John?]. Discusses polarization of corona.
Reviews additional work of H. P. Brougham [see JH's 1868-10-1] as has been requested in preparation for an eloge . JH is critical of poorly described and poorly understood work, unrelentingly tied to Isaac Newton's corpuscular ideas.
Against changing location of Royal Observatory [from Greenwich], but will defer to opinion of [G. B. Airy] Astronomer Royal. Airy is most competent to judge situation. Still ill.
Too ill to work on anything besides nebula catalogue. Discusses recent meteorological phenomena, period of solar spots, and great pyramid.
Occupied with matters besides magnetism lately. Interest in science of Prince Consort [Albert] is praiseworthy. Discusses several observatories and letter of [T. W.?] Blakiston.
Lists magnetic books received from ES. It will be some time before JH can direct his attention to magnetic issues.
Asks for information concerning the magnetic observations and compilations made in various countries and regions.
Thanks for declination readings from photograms at Kew. Thinks meteorological observatory on Vesuvius is good idea, but not sure a magnetic one is. Includes two charts of world.
Has been too ill to write terrestrial magnetism paper for Edinburgh Review. Suggests other people to write it.
Like JH, Smyths have been suffering bronchial problems. Urges JH not to give up [see JH's 1861-1-29] plan of JH writing a review on terrestrial magnetisim.