Is anxious about his aunt Caroline Herschel and would like news of her health.
Is anxious about his aunt Caroline Herschel and would like news of her health.
Would like JH to come to Manchester on 23-25 to give support for the Kew Observatory. F. W. Bessel and G. A. Erman are coming.
Sends a memoir he has scribbled off for next Wednesday's meeting. Would like JH's advice on several points.
Many thanks for JH's explanations, which gave satisfaction to the geologists. Gives two queries of his own for which he would like clarification. Can they print JH's Alpine phenomena memoir?
Pleased that JH can come on the occasion of F. W. Bessel's visit, as W. R. Hamilton, G. B. Airy, and Francis Baily cannot come. Comments regarding Foreign Orders.
Has only just received JH's parcel dispatched some six months ago, due to lack of transport during the winter months. JH's poem on the Old Telescope has been in great demand. Pass the enclosed to Miss Hamilton. Would like an autograph of JH for her album.
On his last passage down the Red Sea the Captain informed TN of the singular alteration of his chronometers. Comments on this and would like JH's views. Magnetic station at Aden has never been set up and the instruments are still at Bombay. Examined the ancient canal while at Suez. Will be pleased to assist JH in any way.
Comments on some papers on vision and photography by Mr. Moser, and compares this with some of JH's own writings on the subject.
About arrangements to visit JH at Collingwood.
Birth of JH's ninth child [Julia].
Sends description and drawings of JH's actinoscope. Requests estimate for time and expense of constructing it. Questions about clock mechanism and prisms.
Regrets that GD cannot build JH's entire actinoscope. If GD can make at least mechanical components, JH will supply optics and clockwork. Can GD complete these [by end of March]? Funds are limited; please estimate cost.
Confirms scale of drawings [for JH's actinoscope]. Has found simple contrivance to replace clockwork. Will order lenses and prisms from Munich; all English glass has color aberrations.
Received JF's paper on 'thermographic process.' Believes that thermic rays were responsible for experimental results of JF, J. W. Draper, and Ludwig Moser. JH's theory of and experiments with thermic rays, which are different from 'calorific' and visible rays, in solar spectrum.
Writes to the Chancellor of the Exchequer to give JH's opinion about the probable utility of continuing to spend money on Charles Babbage's calculating machine.
Tells CB about a visit by JH and Wolryche Whitmore to the Duke [of ?] to present the case for more government funds for Charles Babbage's calculating machine.
Impressed by accuracy of actinometer measurements made by JK, Joseph Dayman, and P. A. Scott from Feb. to Sept. 1841 at JK's observatory at Rossbank [Tasmania]. Suggests methods to improve readings and simplify reductions.
A proposal to complete the calculating machine has been made by Charles Babbage, and AH wants JH's opinion of it.
Submit revisions to instructions for conducting and reporting magnetic and meteorological observations.
JH's reasons for requesting three-year extension of magnetic and meteorological survey from British government and H.E.I.C. Preliminary results from global stations.