See that thou hast an oken barrel, like to those wherein wine and beer are kept, of a just bigness, _viz._ answerable to the bigness of the globe, as is sufficient for the coction: for a barrel that is too big will make the coction slow, and tedious. A greater globe may be fitted to a lesser barrel, but not on the contrary, a great barrel to a little globe: For by how much the bigger the globe is, and the less the barrel, so much the sooner is the work hastned. Now seeing that this Art was invented for the saving of costs, which otherwise would have been expended in providing of stils, cauldrons, furnaces, _&c._ it is best not to have too great a globe, which requires a greater furnace, and is more hardly to be carryed, because it is to be covered within with lute, or a wall; for it is sufficient if it be big enough for the coction. Wherefore I will give you a just and due proportion of both, _viz._ of the globe, and vessel, which in distillations and other operations, the curteous reader may imitate. A globe of the bigness of a mans head, containing three or four cannes, whereof each containeth four pints, is sufficient for the heating of a barrel of 30, 40, 50, 60. and 100 gallons, which by how much the more remote from 100 and nearer to 30, so much the sooner is it heated, and the coction furthered; and on the contrary, by how much the nearer it is to 100 and more remote from 30, so much the slower is the coction. I do not therefore advise that a huge barrel be chosen for a small globe, by reason of a long and tedious operation: And if all and every thing be not so accurately observed to a hair, yet it matters not much, because it sufficeth to do the same thing by the help of one small copper instrument of divers forms. For in this way of distilling, wooden vessels that are requisite to the distilling of spirits, and boyling of Bear, and for baths are more easily provided, then so many copper vessels in the common way. For by this means not only costs are spared, but also it is in stead of building of furnaces, because when any barrel hath been used, you may remove it, and set another in the place of it for another operation, the which cannot be done with stills and cauldrons fastened into a furnace. And this invention is for those that want Artificers, as Coppersmiths, _&c._ because wooden instruments are more easily provided: also by the help of this globe may most secret operations be performed. For the furnace with the copper globe may be built in one place, and in another place the _Balneum_, _viz._ the places divided with a wall, so that he that looks to the fire may not know what is done in the Elaboratory; for oftentimes the care of the fire is committed to heedless servants, that break glass instruments by their carelesseness, by which means oftentimes a most pretious medicine is lost; which danger this invention is without.