Confused by an 'unfixed' photo from JH in which the image shows different effects from different colors of the spectrum. Also other comments on photography.
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Confused by an 'unfixed' photo from JH in which the image shows different effects from different colors of the spectrum. Also other comments on photography.
Sends some samples of photography made with a solar microscope, and comments briefly on the Daguerreotype.
Advises JH not to publish any new processes in photography as there are patent problems. Comments on the Daguerreotype, and on the difficulty of preserving images in some circumstances.
Transmits a message from J. B. Biot, comments on the Daguerreotype, although WT has not tried it.
Comments on many different processes in photography. Still has not tried the Daguerreotype, although WT has had the equipment for a considerable time.
Concerned about the Daguerreotype patent in England, and questions at some length a paper on the origin of freemasonry.
Waxes lyrical about nature, and comments on a new 'positive' paper JH has sent. Refers to JH's move to Hawkhurst.
Sends a few photographs and says he has read JH's recent memoir. Will comment later.
Concerned with developing photography for tourist use. Doubts that colors of the spectrum can be readily displayed on photographic paper. The'chemistry' of photography is not understood.
Announces his invention of the 'calotype', and his application for a patent. Questions JH on his address to R.A.S., objecting to idea that universe is infinite.
Preparing his calotype paper for publication. Looking for a summer house, somewhere interesting to photograph.
Reports receipt of a communication, which argues that all elements are merely isomers of one substance. Expresses support for such a view.
Some details of improvements in the calotype method.
Sends JH sample of chemicals and paper to make calotype himself.
Has read WT's paper before the R.S.L. and now complains they will not print it in the R.S.P.T. as they understand it has appeared elsewhere.
Reports on paper by Samuel Brown to the Royal Society of Edinburgh on the conversion of carbon to silicon, and other transmutations. Reports on discovery of new element, ozone, and complains further about R.S.L. Council.
Sends JH samples of his calotypes. Off to Germany on a photographic expedition.
Carl Steinheil has proposed making telescope mirrors by plating silver on glass. Is writing to JH to tell him that somewhat earlier he had included this process in one of his patents.
JH's account of a comet reminds WT of a strange sighting many years ago. Comments further on improvements in photography, both those made and those needed.
Describes observing of comet that evening.