To make yellow transfer paper, mix together equal quantities of best flake white and isinglass or gelatine, adding sufficient gamboge to give the required tint. Put the ingredients in water, and heat them over a slow fire until dissolved. Then strain the mixture through a piece of muslin to get rid of the coarser particles, and, while it is still quite warm, spread it, by means of a large Bat camel-hair brush, on one side of smooth, thin paper cut to convenient sizes. The paper, when dry. should be passed through the press over a heated lithographic stone. To make re-transfer paper, mix in tepid water one part of best ground plaster-of-Paris with three parts of shoemakers' paste free from alum, adding a small quantity of dissolved patent glue. Strain through double muslin into a jar, and spread cool, with a flat camel-hair brush, on rather thick paper.