Is at present too ill to involve himself in any calculations necessary for making a good optical eyepiece.
Is at present too ill to involve himself in any calculations necessary for making a good optical eyepiece.
Is grateful for his reply. Hopes he is feeling better. Escaped worst of the winter by expedition to Algeria, though the results were disappointing. Comments on some of his observations. Feels sure [W.?] Ackland will be able to construct a suitable eyepiece.
Drawing of 'the singular mottled appearance of portions of the Sun's disk ... March 19th 1864'.
Returns a paper of Mr. Stobart, which deals with astronomical knowledge of the early Egyptians.
Sending FH drawings of sunspots made by W. R. Dawes. Asks FH to inspect them and forward them to R.A.S. secretary R. C. Carrington along with any sunspots drawings made by FH on the same dates.
Comments on remarkable solar activity. JH admits he has no theory to explain sunspots.