JH sends some examples of a unique kind of latent photograph, and adds other comments about various aspects of photography. JH has seen a good aurora. He now agrees with A. C. Becquerel's theory of the spectrum.
Showing 1–9 of 9 items
JH sends some examples of a unique kind of latent photograph, and adds other comments about various aspects of photography. JH has seen a good aurora. He now agrees with A. C. Becquerel's theory of the spectrum.
Concerned that the Colonial governors were not provided with copies of the Standards Commission Report; will not be able to get to Switzerland this year.
His views on the imperfections and lack of suitable instruments at the Cape Observatory.
Has received observations of the comet from C. P. Smyth, which he may like to communicate to the R.A.S. Comments on the deplorable state of the Cape Town [?] Observatory.
Regarding FB's paper on the revision of the boundaries of the constellations.
Will be at the Visitation and intends to spend a few days in town. Has got the catalogue of objects for the star maps.
Thanks for the deodar seeds sent; accepts JL's offer of some young deodar plants. Needs instructions on planting these. Does JL have a copy of JH's 'On the Action of the Rays of the Solar Spectrum on Vegetable Colours, and on Some New Photographic Processes'?
Describes a particularly brilliant aurora, which JH observed from Collingwood on the night of 6 May.
Encourages AE to consider translating some mathematical works; additional comments on mathematics in general.