The desired or similar results may be obtained from different formulæ. The following answers for all practical purposes, but may be varied at pleasure:-- Digest for two or three days red saunders (pterocarpus santalinus) half a pound in three pints of water to which the aqua-ammonia has been added. Then pour off the solution and precipitate by the addition of nitric acid. Wash the precipitate thoroughly with water and dry it. Then dissolve it in strong alcohol and dilute with the same as required to produce the tone or tint that may be desired. Alkanet (anchusa tinctoria) may be prepared in the same way. Dragons' blood dissolved in alcohol and treated in the same manner will produce the various shades of yellow. The foregoing articles, and also madder, indigo, cochineal, and some other coloring substances both vegetable and mineral alone or combined, will produce pleasing results when applied as follows (although they may be introduced into the collodion):-- We prefer first to develope the impression, then to fix and dry it, and afterwards to flow on the toning or tinting solution, as collodion or varnish, &c., is poured upon the plate, allowing the solution to run off the corner, and then levelling the plate to make the fluid flow uniformly over and tint the whole surface of the plate evenly. Then wash at once and thoroughly with clean water, and stand the plate up to dry, after which it may be colored (the dress of any tint or color desired--the face, hands, &c., are flesh tint) with dry colors (as is usual in coloring daguerreotypes) applied to the collodion or upon the varnish. What we claim as our invention and discovery, and desire to secure by Letters Patent, is the application of coloring substances or matter to Photographic impressions or pictures upon glass or metal, or other material in the form and manner herein described. _Witnesses._ James J. B. Ogle, } Giles Langdell [L. S.] Williams Ogle, } M. A. Root. [L. S.] _Dated July 15th, 1856._ * * * * * PATENT FOR THE USE OF ALBUMENIZED COLLODION. _To all whom it may concern:_ Be it remembered, that I, Victor M. Griswold, of the City of Lancaster, in the County of Fairfield and State of Ohio, have invented certain improvements in the art and mode of taking Photographic Pictures, and I do hereby declare that the following is a full and exact description thereof: