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at command would allow.

The most important additions of the year are the illustrations of the half-tone relief screen process and of a variety of the photo-aquatint intaglio process (Photo-gravure Gibbs), prepared for the Museum at reduced prices by Mr. W. Wolfe, of Dayton, O. and Messrs, A.W. Elson & Co. of Boston, Mass., respectively.  Some interesting specimens illustrating the advances made in chromocollographic process work have been given by Mr. E. Bierstadt, of New York and the J. B. Lippincott Co. of Philadelphia.  The collection of materials used in the photo-mechanical processes has been increased by gifts from Messrs. Jas. P. Smith & Co., of New York, and by purchase.  A beginning towards the illustration of the application of chromolithography and of wood-cutting to the production posters, - a kind of