164 
Plate XVIII 
Processes of manufacture 
Figure 1. Longitudinal incising, breaking, and rubbing on the edge of a pebble of slate. 
Shell-heap D. Cat. No. VIII-B-649. (Page 70.) 
Figure 2. Longitudinal rubbing and breaking on the surface of a piece of slate. Shell-heap 
L, Cat. No. VIII-B-730. (Page 70.) 
Figure 3. Longitudinal grooving and breaking on a piece of bone. Shell-heap A. Cat. No, 
VIII-B-1184. (Page 71.) 
Figure 4 . Longitud inal grooving and breaking, by means of which a piece of the wall of a long 
bone was cut out. Shell-heap A. Cat. No. VIII-B-118G. (Page 71.) 
Figure 5. Longitudinal grooving and rubbing on the side edges of the walls of a long bone. 
Shell-heap D. Cat. No. VIII-B-522. (Page 71.) 
Figure 6. Grooving and breaking, by means of which a part of the wall of a long bone was cut 
out. Shell-heap A. Cat. No, VHI-B-881. (Page 71.) 
Figure 7. Whittling on a piece of bone. Shell-heap D, Cat. No. VIII-B-526. (Page 72.) 
Figure 8. Two transverse incisions on a foe bone of a large carnivorous animal. Shell-heap 
D. Cat. No. VIII-B-519. (Page 69.) 
Figure 9. Transverse incising and breaking and longitudinal chipping on a piece of bone that 
has longitudinal grooving on the edges. Shell-heap D. Cat. No. VIII-B-526. (Page 71.) 
^ Figure 10. Gnawing on the ends of a toe bone. Shell-heap A. Cat. No. VIII-B-1180. (Page 
Figure 11. Hacking and breaking, by means of which an antler prong has been cut off. East- 
ern part of shell-heap N. Cat. No. VIII-B-826. (Page 72.) 
Figure 12. Surface made by grooving and breaking on a piece of walrus ivory. Shell-heap 
A. Cat. No. VIII-B-1189. (Page 73.) 
Figure 13. Grooving in a piece of walrus ivory. Shell-heap A. Cat. No. VIII-B-1188. (Page 
73 .) 
Figure 14. Transverse incising and breaking on a lower incisor of a beaver. Shell-heap D. 
Cat. No. VIII-B-612. (Page 72.) 
Figure 15. Incised line in a canine tooth of a bear. Shell-heap D. Cat. No. VIII-B-525. 
(Page 72.) 
Figure 16. Ground surface on the root end of a molar tooth of a beaver. Shell-heap D, Cat. 
No. VIII-B-621. (Page 69.) 
