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Coloured Inks for Pictorial Picture Printing. In 1799 Savage was appointed Chief of the Printing Department of the Royal Institution, Colour Printers prior to 1834 39 and in this post having plenty of spare time, he acquired a Printing plant of his own, and was thus enabled to devote his leisure to experimental work in the Printing Art, which resulted in his giving his attention to Coloured Inks and their production. You will be interested in Savage's book and may like to inspect the Copy preserved in the Library of the Patent Office, London, which is bound in two folio volumes, and con- tains prints of the various stages of the pictures in the book, pulled in order as the Presswork progressed. Baxter's " Cabinet of Paintings " can also be seen in the same Library. Although this elaborate treatise on coloured inks was produced by Savage only about sixteen years prior to the commencement of Baxter's Process, we find that Baxter did not adopt the use of Savage's formula of coloured inks, for Savage's ideal was one which did not contain " Oil," whereas " Oil " coloured inks were one of Baxter's features in the production of his prints. In this distinction of the inks it is probable that Baxter studied and improved the formula of the first English Patent for the manufacture of Coloured Inks, which was by James Rowley in 1772. This ink was compounded of the ingredients used for making-up colours for painting, but instead of being mixed with Water, Rowley used Linseed Oil and Alum, boiled and calcined. It is of further interest to note the fact that this ink of Rowley's, which was for use in printing playing cards from copper plates, at the period of its invention was one which would bear the leesing or polish requisite to be given to playing cards, and in this conjunction