184 
POPULAR SCIENCE REVIEW. 
Fig. 19, 20. Ancient pottery from a British-Roman grave near Plymouth. 
A, JB. Diagram of an ancient hed of blown sand in Barnstaple Bay. 
1. Present beach. 
2. Rocks of do. 
3. Granite boulder. 
4. Balani on the rocks of the present beach. 
5. Sand containing rolled pebbles and shells. 
6. Do. do. do. of smaller size. 
7 and 8. Layers of irregularly stratified sand. 
9. Superficial soil. 
C. Diagram of a submerged forest at Northam Burrows. 
1. Surface soil. 
2. Blue clay. 
3. Rolled pebbles. 
4. Slate rock. 
5. Pebble ridge. 
6. Trees of which only roots remain. 
7. Sand. 
8. High water line. . 
9. Low water line. 
