Stránka:roll 1931.djvu/138

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122 Woodcraft Birch Bark Roll off a flake that shall extend as far as possible on the under side along the dotted line (g). Go around the triangle, flaking o on the under side, till the whole piece of glass is thinned’ on that edge. Now, turn it over, and flake the other side of the edge. It now looks Detatls of Arrowhead Chipping E.7-S, like (h). If skillfully done, the whole face on each side will show the scale-like form of the chippin Now by pressing heavily with the iron ‘tool, nibble off bits till it is shaped as in (1). A little practice at this will enable you to make a fair arrowhead in 15 minutes.