This paper gives a black print but is not so easily prepared as blue print paper. Paper similar to that for blue prints is secured and coated the same as blue prints but with the following solution:

Gelatine........................15 grs.

Distilled Water................. 1 oz.

Tartaric Acid..................15 grs.

Ferric Sulphate.............15 grs.

Ferric Chloride.................30 grs.

Cut up the gelatine in small pieces and soak in the water for three hours. It is then heated until the gelatine assumes a liquid form and the acid, sulphate and chloride added in the order named and the whole filtered while still hot. The coating is applied hot by lamp light but the paper should be dried in the dark. It is printed in sunlight until the image appears and is then toned or developed in a solution consisting of

Water.......................................................................... 2 ozs.

Oxalic Acid.................................................................... 1 gr.

Gallic Acid..................................................................... 4 grs.

The paper should be placed in a tray and this solution poured upon it and rocked as in developing a plate. The image will change gradually to black and the paper is then removed and washed and given a bath of water slightly acidulated with sulphuric acid, again washed and the superfluous water removed with blotting paper.

Monocrome Paper. Immerse a good quality of paper in a solution con-isting of Bichromate of Potash .......................................................75 grs. Distilled Water.............................................................2(1/2)A ozs. This should be done by lamplight.- Dry the paper thoroughly and then print for about ten to fifteen min-ites in direct sunlight and then wash the print thoro-ughly in running water. To obtain a rich red print, low place the print in a solution of chloride of tin, wash and then place in a solution of hypernic wood. If a )lack tone is desired substitute a solution of ferrous sulphate for the tin, wash and place in a solution of tannic acid. If an orange shade is wanted use first a solution of nitrate of lead, wash and then place in a weak solu-ion of caustic potash. The prints must be thoroughly washed between treatment by the various chemicals but if the stream of the water is allowed to strike directly on the print it may wash off the pigment entirely.