3. Then a _copper measure_ of the powdered calcined gypsum is taken--viz. about ½ or ¾ pint and the same quantity of soft water and they are put into a copper vessel and shaken exceedingly well together: and then the mixture is to be poured upon the types, there being first placed upon them an iron frame to form an Edge to sustain the fluid Gypsum and water. 4. Immediately, and without the least loss of time the short square brushes are now to be taken and you must work the Air out quickly with them and continue working till the gypsum is too fixed to allow of more working. 5. When so fixed that you can easily make an impression, that is, while the Plaster is softish, take off the upper frame and scrape clean all the elevated plaster. It will rise again above the level by and by; scrape again--and lastly as soon as it is so fixed that it is not easy to make a mark with yͬ nail, then lay it carefully upon a _soft frame_ (covered with a sort of cloth) and then take a piece of wood that nearly fits the cake, and gently thrust it so as to make it quit the frame; and then dress it with a knife and lay it between two pieces of marble to keep it from warping. 6. The types must now be cleaned by picking out any bits of gypsum left in the Interstices ... and lastly they must be brushed; and then done over again for a new mold. 7. The artist, Mr Austen, Engraver can dress and cure any little imperfection in the plates when cast. 8. The Gypsum requires about 2 hours for calcination; and is known to be right when you break the pieces, and see them moulded quite thro'--Matter of Experience. 9. The Gypsum should be broken with small bits about 2 ounces each. 10. and when calcined they are to be ground on a Stone.... 11. When the moulds are made, and placed between the marbles ... they will be ready in 2 or 3 hours for baking.... 12. They are to be baked being placed upright on stands like those for toasted bread--raised a little from the bottom of the furnace--About 2 hours or 2½hours will take the moulds.... Casting The metal is precisely the Type metal. The Pots must be made quite as hot as the metal--or rather more--. Then the floating plate must be placed in the frame--and the cake or mould directly upon it with its face downwards: Then place upon the top the cover of the frame, and screw it down: and dip the whole in metal melted so that a match will light at it.--The melted metal will run in at those places made in the mould by the bits of brass--till all be full--and then remove the whole to be cooled on a tile in water with lime upon it--and as it cools and shrinks, supply with fresh melted metal.