Scoria

(n.) The recrement of metals in fusion, or the slag rejected after the reduction of metallic ores; dross.

(n.) Cellular slaggy lava; volcanic cinders.

汉密尔顿校对

• The lime was added as a flux, and acted to unite with itself the sand, clay and other impurities to form a slag or scoria. 威廉·亨利·杜利特. 世纪发明.

手打:威利