224 ADDITIONAL GEOLOGICAL NOTES 



feet. 

 Easton Bavents, loss in 6 years .. .. .. ..20 



Easton High Clift, ,,13 ,, .. .. .- ..22 



Covehithe Cliff, ., 6 84 



The accuracy of these observations was checked b}' Mr. Horace B 

 Woodward, and other indications observed conjointly proved that the general 

 loss at Covehithe amounted to about 50 yards since the present Ordnance map 

 was constructed. The lines of high and low water mark had manifestly 

 altered, so that a fresh survey was necessary 



A discussion on Coast Erosion took place at the Conference 

 of Delegates of the Corresponding Societies during the Bristol 

 meeting of the British Association in i8g8. The labours of the 

 Coast Erosion Committee were then at an end. A chief result 

 of this discussion was an application to the Admiralty, which has 

 since secured the co-operation of the Coast Guard in noting the 

 changes on our coast. One speaker, Mr. W. H. Wheeler, who 

 had paid much attention to the subject, then remarked that the 

 retention of a considerable mass of shingle in front of a place 

 would furnish a better protection than a sea-wall. As to the 

 cause of the travelling of shingle along the shore in a definite 

 direction, Mr. Wheeler, in a paper read to Section C. at the 

 same meeting, said "that the travel of shingle is not coincident 

 either with the prevailing or predominant winds, but on a 

 tidal coast the predominant drift is invariably in the same 

 direction as that of the flood tide." {Beport 1898 p. 884.) 

 North of the estuary of the Thames the shingle travels from the 

 north southward ; south of the estuary it travels from the south 

 northward. 



It should be added that the Reports above alluded to contain 

 a Bibliography of the subject up to the year 1895. 



ADDITIONAL NOTES ON THE SECTIONS 

 SHO\VN AT THE NE^A/^ RESERVOIRS IN 

 THE VALLEY OF THE LEA, NEAR ^VAL- 

 THAMSTOW. 



EVIDENCE OF THE PUDDLE-TRENCHES. 

 ByT. V. HOLMES, F.G.S., F. Anthrop. Inst., Vice-President, E.F.C 



While the sections afforded by the excavations for the new 

 reservoirs have been of the highest interest in their display of the 

 various changes in the details of the river deposits, they have 



