Suppose, now, that the paper is properly painted with the ground colour, dried and spread out on a flat board,--the carved blocks ready for use,--and the colours mixed and melted in a warm state,--the process is then conducted as follows. A piece of leather or of oilskin is stretched over a flat block, and a boy lays a coating of one of the colours to be used--say green--on the leather, with a brush. A man then takes that one of the carved blocks which is to stamp the green part of the device, and lays it down flat on the wet colour, by which a coating is transferred to all the raised parts of the block. This is then stamped down, with a firm and steady pressure, upon the piece of paper, by which the green device is permanently impressed. As the carved block is only large enough to stamp a small portion at a time, an adjoining portion of the long piece of paper is taken,--a fresh coating of colour laid on the leather by the boy,--this coating again transferred to the carved block,--and again from thence to the paper. This continues until the whole length of the paper is printed with the green device, care being taken that the different impressions shall accurately join one another at the proper parts. The paper is then laid aside to dry, and preparations are made for printing the second colour upon it. Let us suppose this colour to be _pink_. The proper ingredients are mixed with size, and melted, and a coating of this laid on a block covered with leather, as in the former case. The proper carved block is then taken, and an impression stamped by its means in precisely the same manner as before, with the exception of the colour being pink instead of green. But in laying the wet stamp on the piece of paper, great care is requisite in adjusting the two colours so that they shall not interfere with each other:--for instance, if the green represents leaves and the pink represents flowers, it is important that the pink should not, by a misadjustment of the second stamp, go over a part already occupied by green, so as to give a confused mixture of green leaf and pink flower at the same spot. If we closely examine the pattern of paper-hangings on the walls of our rooms, particularly the inferior papers, we shall frequently see instances of the bad adjustment to which we here allude.