Commence by sprinkling black in small drops at a good distance from each other; afterwards sprinkle equally over large drops of weak potash.
AGATINE.
Proceed as for the green agate, and then sprinkle scarlet all over the cover; finally, throw on blue in small drops, weakened in four times the quantity of water.
LEVANT MARBLE.
After the water, throw on the back-brown in broad streaks as directed for the stone, and then in like manner the aqua regia. This will be found to imitate closely the Levant marble.
PORPHYRY VEIN.
Throw on large drops of black diluted in double the quantity of water. When the colour has struck well into the leather, sprinkle in the same manner brown mixed equally with water. Then apply a sprinkle of scarlet, and afterwards large spots of yellow, the liquid nearly boiling. While these colours are uniting, throw on weak blue, and then aqua regia, which, flowing together down the sides of the book, will form the vein distinctly.
RED PORPHYRY.
Sprinkle with black in eight times the quantity of water, very equal and in small spots. Let it dry, rub, and glaire. Then give two or three sprinkles of fine red, and one of scarlet, and again leave to dry. Finally, sprinkle scarlet in small spots as equally as possible.
GREEN PORPHYRY.