"The collodio-bromide processes have for some time held a considerable place in the pages of the _British Journal of Photography_, and obtained such a prominent chance of being eventually the process of the day in the dry way, that a few remarks upon the application of another medium may perhaps not be uninteresting to the readers of the journal, though little more can be stated than the result of somewhat careless experiments tried at first on an exceedingly dull afternoon. It is not for a moment supposed to be new, for the chances of novelty in photography are small, seeing the legion of ardent workers, and the ground already trodden by its devotees, so that for outsiders little remains except to take the result of labours so industriously and largely circulated through these pages, and be thankful. "Gelatine, which forms the medium of so many printing processes, and which doubtless is yet to form the base of many more, was tried in the place of collodion in this manner:--Thirty grains of Nelson's gelatine were washed in cold water, then left to swell for several hours, when all the water was poured off, and the gelatine set in a wide-mouthed bottle, with the addition of four drachms of pure water, and two small drops of _aqua regia_, and then placed in a basin of hot water for solution. Eight grains of bromide of cadmium dissolved in half a drachm of pure water were now added, and the solution stirred gently. Fifteen grains of nitrate of silver were next dissolved in half a drachm of water in a test tube, and the whole taken into the dark room, when the latter was added to the former slowly, stirring the mixture the whole time. This gave a fine milky emulsion, and was left for a little while to settle. A few plates of glass well cleaned were next levelled on a metal plate put over a small lamp; they were, when fully warmed, coated by the emulsion spread to the edges by a glass rod, then returned to their places, and left to dry. When dry, the plates had a thin opalescent appearance, and the deposit of bromide seemed to be very evenly spread in the substance of the substratum. "These plates were printed from, in succession, from different negatives, one of which had been taken years since on albumen with oxgall and diluted phosphoric acid, sensitised in an acid nitrate, and developed with pyrogallic acid, furnishing a beautiful warm brown tint.