289 



Marl from the farm of Mr. Samuel White, Woodstown. 



Description. — Colour, light sea-green ; the washed grains 

 coarse and of a dark sea-green colour. 



Composition. — In 100 parts : 



Greensand, - - - 88-26 



Clay, .... 8-74 



Quartzose sand, - - 3-00 



10000 

 The proportion of potash in this marl, by direct analysis, is 

 10*3 per cent. 



Marl from the farm of Mr. Henry Guest, near Skulltoivn. 

 Description. — Colour, dull sea-green; the washed grains small 

 in size and of a dark sea-green colour. 

 Composition. — In 100 parts: 



Greensand, . - _ 48-30 

 Clay, ... - 21-47 

 Quartzose sand, - - 30-23 



10000 

 The proportion of potash in this marl, as deduced from the 

 greensand, is 5-5 per cent. 



Marl from the farm of Paul Skull, three miles northeast of 

 Skulltown, Salem, county. 

 Description. — Colour, dull grayish-green; the washed grains 

 rather large in size and of a deeper green colour. 

 Composition. — In 100 parts: 



Greensand, ... 91*5 

 Clay, - ... - 7-5 



Quartzose sand, - - TO 



100-0 

 The proportion of potash contained in this marl, shown by 

 analysis, is 9 per cent. 



In the vicinity of Sharptown, and in two places near Dr. 

 Swing's, upon the road from thence to Salem, the marl stratum 

 is pretty fully exposed, and seems to present almost precisely the 



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