Now that they may be made equal in strength, weight, and thickness, you must weigh one crucible rightly made by the help of the mould in one scale, and a piece of the prepared earth, which is to be put into the other scale, and if they be equal in weight, take out that piece, and put in another; and this do so often, till you be come to the number of the crucibles which you would have made: By this means they are made equal, and you need not cut off any overplus of the earth when it is fitted to the mould, because all are made equal, by reason of the equal weight of the matter of each of them, and the work is sooner done then otherwise. This indeed is the best way but tedious and laborious, wherefore considering the matter a little more seriously, I found at last that the following way is far better than the former: whereby not only stronger crucibles are made, but also more in one hour, then in that former common way in three or four. Where first, the mould is made of latten (on which I advise you to apply the earth) signified by the letter _A._ _viz._ that being the best, which is made by the help of fusion. Then the counter-mould answering this, signified by the letter _B._ yet so that that do not enter too deep into this, not touching the bottom by the distance at least of one fingers breadth; but in greater crucibles a greater thickness of the bottom is required, as the practise will teach thee. Let him therefore that is making crucibles apply the earth to the mould, as hath been above said in the First manner, which being done, let him again take off the crucible that is formed or cast, and set it in the air to be dryed. Then having First made a sufficient number of crucibles, let him make the mould clean from the earth or sand, and annoynt it with grease, or oyl Olive taken up with a sponge, as also the counter-mould, into which let him put the crucible being half made and dryed, and into this the mould, which he must strike above twice or twice or thrice with a heavy wooden mallet, that the earth may be rightly, and exactly applyed to the mould; which being done let him take off the mould, and turn the countermould together with the crucible, which let him knock a little against the form (where the crucibles are made) and let him take in his hand the crucible falling from thence; which he must afterwards dry and burn, as hath been above said in the First manner. And by this way are made the best, and the best proportioned crucibles, Fixed and smooth, not only for melting of metals, but also for minerals and salts; the like to which I never yet saw, as being without all danger, if so be rightly made of the best earth. And that they may be made equal in weight and strength, they must be weighed as before hath been said, And this labour is easie and pleasant, when they are made with ones own hand, and that greater or lesser at pleasure.