Further chemicals used for fixing, including bromide potash.
Showing 21–32 of 32 items
Further chemicals used for fixing, including bromide potash.
Comments on Louis Daguerre's use of muriatic ether, and encloses a photograph of hand writing.
Comments on a number of chemicals used in photography, as well as referring to JH's process of making 'enlargements.'
Consists mostly of a transcription of two short notes from J. B. Biot to JH by way of WT.
Sends a sample picture fixed by use of iodine [potash].
More photography comments. Problems with use of hyposulfite fixer. Superiority of English over Daguerreotype in being able to make copies.
Sends JH a positive copy and a transparency. Remarks on JH's use of muriate of lead and asks JH to explain chemistry of it.
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.