82
PREHISTORIC TIMES
axis, while generally one or more longitudinal flakes have also been removed.
Many of the flint flakes were certainly never intended to serve as knives, but were worked up into saws, awls, or arrowheads. Savages use flint or chert in this manner, even at the present day; and the Mexicans, in the time of Cortez, used precisely similar fragments of obsidian.