PLATE XX

a. Chisel consisting of fine, homogeneous, gray-green jade,
set in the end of a long handle of bone and wood lashed to-
gether with hide. From St Michaels, Alaska.

b. Hand chisel of homogeneous, dark-green jade, square in
cross-section, with a long, tapering edge. Broken, but scarfed
with pieces of wood and a seal-skin lashing. The chisel shows
three shallow longitudinal grooves. From Kotzebue sound,
Alaska.

c. Chisel or graving tool with a blade of translucent, grass-
green jade, slightly oval in cross-section and brought to a
rounded point; set in the end of a handle of walrus ivory.
From Seward peninsula, Alaska.

d. Chisel consisting of a thin, flat blade of bright-green
jade inserted in the end of a handle of caribou-horn orna-
mented with a line of round holes. From Cape Nome, Alaska.