Note 36 — Constituents of the Mound.
Reading edition
W. J. Dall (contrib. l. c., I, p. 47) states that during his excavations of the shellmounds of the Aleutian Islands he found on the average one object in one-half ton of earth. This would be 2.63 objects to one cb. m. The yield of the Emeryville shellmound is three objects to one cb. m.