Now though I could not so exactly cut this _conical Body_ through the _Axis_, as is represented by the figure Y; yet by _anatomizing_, as it were, of several, and taking notice of divers particular circumstances, I was informed, that could I have artificially divided a flaw’d drop through the _Axis_ or _Center_, I should with a _Microscope_ have found it to appear much of this form, where A signifies the _Apex_, and B the blunt end, CC the Cone of the Basis, which is terminated at T the top or end of it, which seems to be the very middle of the blunt end in which, not only the conical body of the Basis CC is terminated, but as many of the parts of the drop as reach as high as DD. And it seemed to be the head or beginning of a Pith, as it were, or a part of the body which seemed more spungy then the rest, and much more irregularly flawed, which from T ascended by EE, though less visible, into the small neck towards A. The Grain, as it were, of all the flaws, that proceeds from all the outward Surface ADCCDA, was much the same, as is represented by the black strokes that meet in the middle DT, DT, DE, DE, &c. Nor is this kind of Grain, as I may call it, peculiar to Glass drops thus quenched; for (not to mention _Coperas-stones_, and divers other _Marchasites_ and _Minerals_, which I have often taken notice of to be in the very same manner flaked or grained, with a kind of Pith in the middle) I have observed the same in all manner of cast Iron, especially the coarser sort, such as Stoves, and Furnaces, and Backs, and Pots are made of: For upon the breaking of any of those Substances it is obvious to observe, how from the out-sides towards the middle, there is a kind of Radiation or Grain much resembling this of the Glass-drop; but this Grain is most conspicuous in Iron-bullets, if they be broken: the same _Phænomena_ may be produced by casting _regulus_ of _Antimony_ into a Bullet-mold, as also with _Glass of Antimony_, or with almost any such kind of _Vitrified substance_, either cast into a cold Mold or poured into Water. Others of these Drops I heat red hot in the fire, and then suffered them to cool by degrees. And these I found to have quite lost all their _fulminating_ or flying quality, as also their hard, brittle and springy texture; and to emerge of a much softer temper, and much easier to be broken or snapt with ones finger; but its strong and brittle quality was quite destroyed, and it seemed much of the same consistence with other green Glass well nealed in the Oven.