255 



The amount of potash in this marl, deduced from an analysis of 

 the greensand of this locality, is 6*1 per cent. 



Marl from the middle part of the bed at Squankum,. 



Composition. — In 100 parts: 



Greensand, . - . 35-72 



Clay, .... 54-28 



Quartzose sand, - - 10-00 



100-00 

 The amount of potash in this marl, deduced from that of the 

 greensand, is 3-7 per cent. 



Marl from the lower part of the bed at Squankum. 



100-00 

 The amount of potash which this marl contains, derived from 

 an analysis of the selected grains, is 7-1 per cent. 



In the neighbourhood of Mount's Mills or Berkelue's, at Mr. 

 Rue's, half a mile south of Spotswood, there is a black clay 

 like that of Middletown Point, containing a considerable quantity 

 of the marl. It has been thought to be somewhat beneficial to 

 the land. It is near Mr. Berkelue's mill-pond, and not in the 

 lowest ground. There is a considerable undulation of the surface 

 in this quarter, though the denudation would seem not to have 

 reached a low level. The superficial stratum is sandy, contain- 

 ing also some of the loose materials characteristic of the marl 

 region. 



At the pits of William Johnson, one mile east of the former, 

 the supposed marl stratum exhibits a small proportion of the 

 greensand with much siliceous sand, some clay and mica, and 

 has a decidedly sulphurous odour; it also tastes of copperas, 



