In the _eleventh_, First, of _Alchimy_, its Original and Antiquity, the Vessels and Instruments belonging thereunto. Secondly, of the _Philosophers Stone_, what is meant by it, and whether by means thereof true Gold can be produced? And in general, whether there be any such thing, as a true and real Transmutation of one Mettal into another? Where are delivered the several Processes of the reputed _Adepti, Raymund Lulle, Azoth, Arnold de Villanova, Paracelsus, Sendivogius, &c._ but all exploded as fals and deceitful. Thirdly, {113} of the decisions in Law concerning Chimical Gold, true or fals. Fourthly, what the celebrated _Philosophers Stone_ was among the Ancients, and what they understood by the same? In the _twelfth_: First, Of the _Seminal Principle_ of all things, its origine, nature and property; of the way how Nature proceeds in the Generation of _Minerals, Vegetables, Animals_; of Spontaneous Generation; of _Zeophyts, Insects_ of all sorts, and particularly of the Worms bred in Men; together with the causes why Nature would produce such swarms of infinite sorts of Insects. Secondly, of the variety and differences of _Vegetables_; of the requisits to know the _virtues_ of _Plants_, and of the several waies of _Engrafting_. Thirdly, of the _Art of Distilling_, whereby Nature is imitated, as doing all her under-ground works, in the Opinion of this Author, by _Distillation_. Fourthly, of the _Laboratories of various Arts_, in which, according to Natures pattern, used in her Subterraneous Operations, strange things may be performed: where treating of _Chymical Secrets_, the truth of the Preparation of _Aurum potabile_ is discussed, and the _Magisteries_ of Gold, Silver, Iron, Tin, Copper and Lead, examined: to which is subjoyned an _Appendix_, furnishing such Rules, whereby Students in _Chymistry_ may be directed in their work, and true Operations distinguished from fals ones. Fiftly, Of _Metallostaticks_, where by the mixture of Mettals and Minerals may be certainly known; together with a way of weighing the Proportions of _moist_ and _dry_, existent in every Compound, as well Vegetable and Animal, as Mineral. Sixthly, of _Glass-making_, where is treated of the Nature of _Glass_; of the Artificial Production of all sorts of Precious Stones, partly from the Authors own Experiments, partly from the Communication of his Friends, and the Collection of the best Writers upon that subject. Seventhly, of _Fire-works_, where the Invention and Preparation of Gunpowder is largely discoursed of, and the waies of making _Squibs, Fires burning in Water_, {114} and many others, used in Publick Festivities, are described. Eighthly, of some _Mechanical Arts_, as that of _Gold-smiths, Black smiths, Copper smiths, Wyre-drawers_, in the last whereof he resolves this _Problem_; a certain weight of Mettal, and the bigness of the hole, through which the Wyre is to be drawn, being given, to find into what length so much Mettal can be spun out.