. Bulletin. Ethnology. Fig. 192. Specimens illustrating successive steps in shaping crumbling, and grinding. d hatchet blades by fracture. Wide Range I'rocesses of J. D. McGuire at the Xational ^luseum some years ago, and the valuable results of his work are The crumbling processes had, however, a much wider field than that of shaping implements and utensils by pecking with a hammer. Vast numbers of petroglyphs appear on slabs, bowlders, and broad rock faces throughout America, displaying great diversity in manner of execu- tion and finish. Hammerstones of ordinary form were doubtl
. Bulletin. Ethnology. Fig. 192. Specimens illustrating successive steps in shaping crumbling, and grinding. d hatchet blades by fracture. Wide Range I'rocesses of J. D. McGuire at the Xational ^luseum some years ago, and the valuable results of his work are The crumbling processes had, however, a much wider field than that of shaping implements and utensils by pecking with a hammer. Vast numbers of petroglyphs appear on slabs, bowlders, and broad rock faces throughout America, displaying great diversity in manner of execu- tion and finish. Hammerstones of ordinary form were doubtless employed, but pointed picklike implements, ha fted or unhafted, Avere better suited to the purpose (fig. 193). Figure 191 is intended to illustrate the probable method of carving the minor relics of hard stone, many of which are elaborately embellished with symbolic 1 Holmes, Manufacture of Peclced-abraded Stone Implements. 2 See his two memoirs entitled " The Stone Hammer and Its Various Uses" " Materials, Apparatus, and Processes of the Aboriginal ; 38657°—19—Bull. 60, pt i 23 and. 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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