Note 12 — BOOK XI.
Herbert Hoover translation
[Pg 509][12] An analysis of this "slag" by Karsten (Archiv. 1st Series IX, p. 24) showed 63.2% lead oxide, 5.1% cuprous oxide, 20.1% silica (from the fuel and furnace linings), together with some iron alumina, etc. The pompholyx and spodos were largely zinc oxide (see note, p. 394).