department would need more space than can well be devoted to the subject. Colouring with pastels or crayons is, however, extremely easy, the rough surface of the paper taking the colour well. For water colours it is advisable to gently rub the surface of the enlargement with a pad of fine linen or cotton wool dipped in weak ammonia water, so as to make the colours take ; or diluted solution of ox-gall may be used for the same purpose. The enlargement must be absolutely dry before any colour is applied, or blisters and running of the colours will ensue. For finishing in oils, the enlargement is treated as follows. We must first apologise for the rough-and-ready formula, but it was obtained from a professional colourist, who had used nothing else for over fifteen years. Obtain one pennyworth of clear size and dissolve in a pint of warm water, and flow over the enlargement just as if one were coating a dry plate. The film must not be touched with the fingers. When quite evenly covered, set the canvas up about four feet from the fire to drain and dry, when it will be found that the oil colours will take well, and yet not sink in and stain the paper or canvas. Mr. William Brooks, in the "Year Book of Photography," 1885, proposes the following plan for the greater preservation of en-largements : - Good white shellac is dissolved in alcohol, to which solution an equal quantity of a saturated solution of borax in water is added in small quantities, and shaken. The liquid should be quite clear, or else it must be filtered, and it should remain clear when diluted with from five to ten times the quantity of water. The enlargement is laid flat on a table face upwards, and the dilute solution is sprayed evenly over the whole surface by means of a spray diffuser. When the print is entirely covered and damp, it is allowed to dry, and shows no trace of the last treatment.
Collodionising mid Waxing Bromide Prints. Bromide prints may be given a slight glaze by squeegeeing the print whilst wet down to waxed plate glass, or sheets of ebonite, or ferrotype iron. A still higher glaze may be obtained by waxing a sheet of plate glass, and then coating it with enamel collodion,
Pyroxyline ... ... ... ... ... 6 grs.
Methylated alcohol............ 1 oz.
Ether... ...... ...... ... 1 ,,
As soon as the collodion has set it should be immersed in a dish