Matter for stereotyping is set with high spaces and quadrates. The forms must be small, containing about two pages of common octavo. A slug type-high is put above the top line and another below the foot line of each page, to protect the ends of the plates from injury when they are passed through the shaving-machine. Beveled slugs, in height equal to the shoulder of the type, are placed on both sides and between the pages, to form the flange by which the plate is to be clasped by the hooks of the printing-block. Before the form is sent into the foundry, the type must be carefully compared with the proof, to detect any errors which may have been left uncorrected. Care must be taken to lock up the form perfectly square and quite tight, to prevent the types from being pulled out when the mould is raised from the pages. It must be evenly planed down, and no ink or dirt or incrustations from the ley be allowed to remain on the surface. The face of the type being clean and dry, and the bottoms free from particles of dirt, the form is laid on a clean moulding-stone, and brushed over with sweet-oil, which must be laid on as thinly as possible, care being taken that the entire surface of the types is covered. A moulding-frame, with a screw at each corner, (called a _flask_,) and fitting neatly to the form, is next placed around it. The material for moulding is finely ground gypsum, nine parts of which are mixed with about seven parts of water, and well stirred up. A small quantity of the liquid mixture is poured over the pages, and gently pressed into the counter of the types with a small roller, for the purpose of expelling confined air; after which, the remainder of the gypsum is poured in, until the mould is somewhat higher than the upper edge of the flask. In a few minutes the mixture sets, and the upper side is smoothed over with a steel straight-edge. In about ten minutes the mould is gently raised by means of the screws at the corners of the flask; and, after being nicely trimmed at the sides, and nicked on the surface-edges to make openings for the metal to run in, it is placed on a shelf in an oven, and allowed to remain until the moisture has quite evaporated.