Fourth 5 ft. — Seven blows . 



.. 8 ft. N 





Eight „ 



.. 9 ft. 





Nine „ 

 Thres „ 

 Three „ 



.. 10 ft. 

 .. 11 ft. 

 .. 12 ft. 



> 36 blows, 365 ft. 

 drop. 



Six „ 



.. 13 ft. 



j 





Fifth 5 ft.— Twenty blows 



.. 9 ft. v 





Fifteen „ 



.. 10 ft. 



54 blows, 494 ft. 



Fifteen „ 

 Four „ 



.. 8 ft. 

 .. 11 ft. J 



drop. 



Sixth 5 ft. — Seven blows 



.. 9 ft. ^ 





Ten 



One ,, 



Fifteen ,, 



.. 10 ft. 

 .. 8 ft. 

 .. 11 ft. 



33 blows, 336 ft. 

 drop. % . 



Total 232 blows, 1,640 ft. 



This evidences great inequality in the strata passed through, 

 and shows that it is softer at the bottom than it is some 

 distance up. 



Pile D.— 130 ft. ; girth, 77 in. 56 ft. up ; toe, 15 in. ; head, 

 20 in. (Heavy pile) Ram, 32 cwt. 



This pile was left over-night, after being driven for 15 ft. It 

 took six blows from 10 ft. to 12 ft. before it would start to drive 

 the last 15 ft. After extending the jetty out some distance the 

 clay became stiffer, and, as the driving was harder, several piles 

 showed that the high falls were severe on their heads. The 

 author then insisted on a heavier ram (not less than 60 cwt.) 

 being procured. This new monkey, when obtained by the 

 contractor, actually weighed a little over 61 cwt., and from this 

 time out no more trouble was experienced, and the driving was 

 done in about half the time it previously occupied. 



Pile F.— 118 ft. ; head, 20 in. ; toe, 16 in. ; girth at 50 ft. up, 

 68 in. ; length above the "fish," 42 ft. ; 61 cwt ram. 



No difficulty in driving. This pile is typical of most which 

 were driven after the heavier ram was obtained, half an inch per 



