. Bulletin. Ethnology. 180 BUREAU OF AMERICAN ETHNOLOGY [Bull. 170. Figure 49.—Concave mirrors, a, Offering No. 9 (magnetite), b, Offering No. 11 (il- menite). Curvature of mirror faces shown in profile not exact. Compare with plate 62, a, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Bureau of American Ethnology. Washington : G. P. O.

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectethnolo, bookyear1901