Forwards letter from G. A. Erman of Berlin requesting that B.A.A.S. fund [H. J. R.] Petersen's study of terrestrial magnetism.
Forwards letter from G. A. Erman of Berlin requesting that B.A.A.S. fund [H. J. R.] Petersen's study of terrestrial magnetism.
Corrects date on publication by G. A. Erman.
Gratitude for copy of Bank's published volume on gold coinage controversy. Regrets that volume does not contain letter to the Times containing U.S. assay master W. E. Du Bois's testimony to integrity of British gold coinage, 'a most satisfactory answer to Mr. Segal's charge against it.'
Writes to support grant request from Georg Erman of Berlin to allow Erman to do calculations on magnetism observations from circumnavigation of world.
In commenting on a paper on actinometric measurements varying with depth of atmosphere, JH questions the accuracy of the equipment used.
Thanks for grant of £50 from B.A.A.S. for calculations related to request from Georg Erman [see JH's 1870-5-6].
Requests some rewording of B.A.A.S. resolution [see JH's 1870-9-27].
Has received, through the good offices of the Smithsonian Institution, a number of back issues as well as current issues of the Proceedings of the American Philosophical Society of Philadelphia. The best way to send these volumes is by way of the Smithsonian.
Asks a whole series of silly riddles, and JH complains of not having heard from AD.
About a grant to support [H. J. R.] Petersen while he carries out the reduction of terrestrial magnetic observations.
Thanks CB for receipt of a meteorological work by CB's son [B. H. Babbage], now in Australia. JH says he grows stupider every day and is a 'prisoner in the bonds of bronchitic tyranny.'
Is pleased to hear of signs of recovery for RM from his ill health, and all wish him a complete recovery.
Comments on the effect of great temperature variations on the speculum of a telescope.
Responds that R. A. Proctor's theory [see GA's 1870-2-5] is possible, and explains why.
Cannot address Earl de Grey [G. F. S. Robinson] concerning members of Royal Commission without a request from the Earl. Cannot, therefore, write on behalf of JS [see JS's 1870-3-8].
Asks whether WS has photographs of the sun for 21 and 22 April. Notes how curious sunspot activity has been. Doubts that such is reconcilable with the notion of 'meteoric in-falls.'
Is returning March heliographs. Discusses the appearance of the spots. Has not received the April heliographs.
Wants to compare Mr. Titterton's photographs of the spot groups to [Warren] de La Rue's. Has tried to determine if some localities regularly have spots.
The research shows no particularly 'maculiferous' area on the sun, but WS may, as WS requested, present 'data' to the R.A.S. Has noticed two new spots on helioautographs on 20 and 27 April.
Sends diagrams showing three new couplets of sunspots. The sun is entering a new phase of activity. Sends drawings made with a glass pen by his son Alexander.