I N D E X

In the third part, concerning the proofs of perfection, the following are contained:

LXXXVII. Division of the topics to be discussed. 150
LXXXVIII. Concerning the cupel original: "cineritio"; a vessel made of bone ash used to refine precious metals, why certain bodies endure in it, and certain others do not. ibid.
LXXXIX. How the examination by the cupel is to be carried out. 152
XC. Concerning Cement original: "Cemento"; a dry refining process where metal plates are layered with chemicals and heated, why certain bodies endure it more, and others truly less. 153
XCI. The examination by Cement: how it is to be composed and carried out. 155
XCII. Concerning ignition testing metal by heating it to redness to observe color changes or impurities. 156
XCIII. Concerning fusion melting. 157
XCIIII. Concerning exposure to the vapors of sharp substances original: "acutorum"; likely acidic or corrosive vapors used to test corrosion resistance. 158
XCV. Concerning the quenching of ignited bodies. 159
XCVI. Concerning the admixture of burning Sulfur. 160
XCVII. Concerning calcination reducing a metal to powder through heat and