404 



PROFESSOR HUGHES 



Fig. 10. Section under Racquet Courts in Thompson's Lane. 



a. Surface soil. 



b. Clayey alluvium. 



c. Impure peat. 



d. Running sand. 



d'. A band of stiff clay occurred at this horizon 

 at 15 ft. in adjoining pit. 



e. Black silt with subordinate gravel. 

 /. Silt with subordinate black silt. 



g. Gault. 



Feet. Inches. 



1 



5 



4 



1015 



In digging the foundations for the new Electric Works 

 opposite Magdalene College, a similar section through deep 

 alluvium was exposed. 



In sinking for the southern pier of the Victoria Bridge at 

 Chesterton, which is near the margin of the recent valley of 

 the Cam, the gault was reached at 16 feet. The section 

 showed surface soil and made ground on sandy black silt with 

 bones, shells and wood ; the shells were especially numerous at 

 the base where it rested upon the gault. The river water was 



