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.

Thanks for the photographs WD sent for the dates requested in JH's 1870-4-23.

Thanks for sending G. A. Erman's two papers on terrestrial magnetism and letter to JH. Will forward these to G. G. Stokes with recommendation that B.A.A.S. continue funding for reduction work of H. J. R. Petersen. Awaits AM's visit to Collingwood.

Forwards letter from G. A. Erman of Berlin requesting that B.A.A.S. fund [H. J. R.] Petersen's study of terrestrial magnetism.

Writes to support grant request from Georg Erman of Berlin to allow Erman to do calculations on magnetism observations from circumnavigation of world.

Thanks RP for sending RP's Other Worlds than Ours and supplies comments, some favorable, on numerous claims made therein, e.g., on RP's theory that Jupiter and Saturn are hot and to some degree luminous.

About a grant to support [H. J. R.] Petersen while he carries out the reduction of terrestrial magnetic observations.

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.

Assures RP that he is not upset at RP for publicly questioning some of JH's ideas. Continues discussion of point in perturbation theory for Uranus.

Giving his opinion on a paper and drawing of [Francis] Abbott.

Further report on a paper and drawing of [Francis] Abbot [very similar to WH's 1870-5-18].

Expresses skepticism on the claims made by F. Abbott, observing from Tasmania, of the detection of changes in the Eta Argus nebula. Compares Abbott's drawings with drawings made by JH and and by JH's son John.

About an application to the B.A.A.S. for a grant to fund the calculations related to reducing the magnetic observations of 1847-48.