Note 12 — BOOK XII.

[Pg 578][12] Agricola (De Nat. Fos., 221) says:—"There is a species of artificial sulphur made from sulphur and iron hammer-scales, melted together and poured into moulds. This, because it heals scabs of horses, is generally called caballinum." It is difficult to believe such a combination was other than iron sulphide, but it is equally difficult to understand how it was serviceable for this purpose.