long continuance of time, metals, and meane minerals, according to the purity or impurity of their coagulated substances; and the temperature, defect, or excesse of the heat that recocts them in the entrails of the earth. Without going from my intention of the foresaid exhalations, I thought fit to touch a little upon an experiment whereunto I arrived by my industry, which I thinke will not be disagreeable. Take good old Wine, and put therein a certaine quantity of Salnitre, and Camphire, in a Platter upon a fire pan, within a Closet well firmed, that aire cannot enter, and make it evaporate therein, and that there be no more covering then the thicknesse of the backe of a knife, to give it so much aire as it must have, to make it burne. This being done, shut well your little window, that nothing may vapour out after you have withdrawne the dish, or platter, from thence to 10. 20. or 30. yeares; provided that the aire do not enter, and that the winde blow not in; bringing in thither a lighted waxe candle, you shall see infinite little fires capring as lightnings in the great heats of Summer, which are not accompanied with thunders and lightnings, nor with stormes, windes, and raines, having nothing but an inflamation of Aire, by reason of Saltpeter, and Sulphur, which are elevated from the Earth. Before wee passe from our intention of vapours and exhalations, that no man doubts but do proceed from heat introduced within the earth by the continuall motion of the heaven round about, and of the Celestial bodies, whence light is accompanied with some heat that it darts thereinto: Let us come to the experiments next approaching to our sensible knowledge; wee see, that the fire leaves two sorts of excrements, the one grosser, namely, Ashes; remaining in the bottome of its adustion, that containeth Salt and Glasse; and the two fixed and solid Elements, Fire and Earth: The other more light, and subtill, which the fume carries upwards; that is, the Soote, wherein are contained the two volatill and liquid Elements, called by the _Chymists_, Mercury and Sulphur, and by the _Naturalists_, Vapour, and Exhalation. By _Mercury_, is designed Water, or Vapour, and by _Sulphur_, Oile, and Exhalation; Of Salt and of Earths therein, there are found a very small quantity, yet sufficient, thereby to perceive how the four Elements are found out in the resolution of all the composed Elementaries: Take then the Soote of Chimney, but of that which shall mount highest in a very long Chimney pipe, and in the very top, where it must bee most subtill, thereof fill a great Cornue, or an Alembic two parts of three, then apply thereunto a great recipient, which you wrap about with linnen wet with fresh water. Give fire by small quantities, the water and the oil will distill together, although the water ought in order to issue out first. After that, all these two liquors shall passe through the Recipient, and when nothing else shall