JH's experiments to find compounds suitable for photography. Accidental discovery of effect of 'nitrate of Silver.' Note of 22 Jan. from Francis Beaufort alerted JH to L. J. M. Daguerre's secret processes and W. H. F. Talbot's experiments.
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JH's experiments to find compounds suitable for photography. Accidental discovery of effect of 'nitrate of Silver.' Note of 22 Jan. from Francis Beaufort alerted JH to L. J. M. Daguerre's secret processes and W. H. F. Talbot's experiments.
Fourth observatory, at Van Diemen's Land [Tasmania], will be conducted by J. H. Kay, to be landed from one of vessels [Terror and Erebus] bound for Antarctica. This vessel will also carry observers and instruments for stations at St. Helena and Cape.
Mentions visit of 1 Feb. 1839 from W. H. Fox Talbot. Reports that JH has now 'accomp[lishe]d the whole problem [of photography].' Describes JH's recent results.
A letter of reference for Syms Covington.
Departure of J. C. Ross for Antarctic expedition is approaching. Hopes that Admiralty will soon authorize R.S.L. to assist Ross in preparing instruments and coordinating global observations.