Note 1611 — BOOK XXXIV. THE NATURAL HISTORY OF METALS.
John Bostock translation
“Æris flos.” Ajasson makes some correct remarks upon the difference between the “scoria” and the “flower” of the metal. The former may be considered as consisting of the metal, mixed with a certain proportion of heterogeneous matter, which has been separated during the fusion of the ore, while the latter consists of the pure metal in a state of mechanical division.—B.