146 CERTAIN ABORIGINAL REMAINS, BLACK WARRIOR RIVER, 
red. The cream-colored paint upon one of the discs, analyzed by Dr. Н. F. Keller, 
proved to be an impure white-lead. White-lead, as the reader is aware, is lead car- 
bonate and of the same composition as the incrustation frequently found on the sul- 
phide ore of lead. Masses of galena (lead sulphide) are often found in the mounds, 
Fie. 19.—Stone disc. Mound С. (Diameter 10.25 inches.) 
and as the reader will see, such masses were met with by us at Moundville. Accord- 
ing to Dr. Keller, even a careful quantitative analysis of the carbonate deposit from 
galena would not show whether it was originally the manufactured pigment or the 
