When the Kernels are duly roasted, and well cleansed, they put them into a large Mortar to reduce them into a gross Powder, which they afterwards grind upon a Stone till it is very fine, which requires a more particular Explication.
They make choice of a Stone which naturally resists the Fire, not so soft as to rub away easily, nor so hard as to endure polishing. They cut it from 16 to 18 Inches broad, and about 27 or 30 long, and 3 in thickness, and hollowed in the middle about an Inch and a half deep. This Stone should be fix'd upon a Frame of Wood or Iron, a little higher on one side than the other: Under, they place a Pan of Coals to heat the Stone, so that the Heat melting the oily Parts of the Kernels, and reducing it to the Consistence of Honey, makes it easy for the Iron Roller, which they make use of for the sake of its Strength, to make it so fine as to leave neither Lump, nor the least Hardness. This Roller is a Cylinder of polish'd Iron, two Inches in diameter, and about eighteen long, having at each End a wooden Handle of the same Thickness, and six Inches long, for the Workman to hold by.
When the Paste is ground as much as is thought necessary, they put it hot in Moulds made of Tin, where they leave it, and it becomes hard in a very little time. The Shape of these Moulds is arbitrary, and every one may have them made according to his Fancy; but the cylindrick ones, which will hold about 2 or 3 Pounds of Chocolate, seem to me to be most proper; because the thicker they are, the longer they keep good, and may be commodiously held when there is occasion to scrape them. These Rolls ought to be wrapped in Paper, and kept in a dry Place: it should also be observed, that they are very susceptible of good and ill Smells, and that it is good to keep them 5 or 6 Months before they are used.
Now the Kernels being sufficiently rubb'd and ground upon the Stone, as we have just directed, if you would compleat the Composition in the Mass, there is nothing more to be done, than to add to this Paste a Powder sifted thro a fine Searce, composed of Sugar, Cinnamon, and, if it be desired, of _Vanilla_[c], according to the Quantities and Proportions, which we shall teach in the Third Part of this Treatise; and mix it well upon the Stone, the better to blend it and incorporate it together, and then to fashion it in Moulds made of Tin in the form of Lozenges of about 4 Ounces each, or if desired, half a Pound.