No summary available.
No summary available.
A note with a copy of JH's article on telescopes for the Encyclopaedia Britannica, together with some papers to be forwarded to James Glaisher.
Thanking him for his paper on telescopes. Observations of JH's semicircular map of the world.
Has tried a number of different fractional projections, some more interesting than others [see GA's 1860-12-7].
No summary available.
No summary available.
Offering sympathy on the death of JH's daughter [Margaret Louisa].
No summary available.
No summary available.
No summary available.
No summary available.
Reminds JH that the algebraic formulation of the theory of the achromatic telescope eyepiece was formulated by GA.
Is sending a tract on 'Probable Errors.' Further observations on JH's article on telescopes.
Recognizes the validity of GA's claim to the eyepiece theory [see GA's 1861-3-27]; JH did not have space to deal adequately with the subject of telescopes.
Asks for his comments on the results of his Magnetic Register 1848-1857.
Further remarks concerning his Magnetic Registers [see GA's 1861-4-22].
Asks GA many questions about his magnetical explanation [see GA's 1861-4-22].
Regarding the evaporation of water as a source of electricity. Magnetic results in relation to the North Atlantic.
No summary available.
No summary available.