CHAP. IV. OF ANCIENT BUILDINGS. 225 



MEASUREMENTS BY DB. H. JOHKSON OF THE THICKNESS OF 

 THE VEGETABLE MOULD OVEB THE ROMAN BUIN8 AT 

 WBOXETER. 



Trenches dug in a field called " Old Works." 



Thickness 



of mould in 



inches. 



1. At a depth of 36 inches undisturbed sand was 



reached 20 



2. At a depth of 33 inches concrete was reached 21 



3. 9 inches concrete was reached 9 



Trenches dug in a field called "Shop 

 Leasows ;" this is the highest field within the 

 old walls, and slopes down from a sub-central 

 point on all sides at about an angle of 2. 



of mould in 

 inches. 



4. Summit of field, trench 45 inches deep . . 40 



5. Close to summit of field, trench 36 inches deep 26 



6. trench 28 inches deep 28 



7. Near summit of field, trench 36 inches deep 24 



8. trench at. one end 39 

 inches deep ; the mould here graduated into 

 the underlying undisturbed sand, and its 

 thickness (24 inches) is somewhat arbitrary. 

 At the other end of the trench, a causeway 

 was encountered at a depth of only 7 inches, 

 and the mould was here only 7 inches thick 24 



9. Trench close to the last, 28 inches in depth .. 15 



10. Lower part of same field, trench 30 inches deep 15 



11. trench 31 inches deep 17 



12. trench 36 inches deep, 



at which depth undisturbed sand was reached 28 



