234 



99-40 



Marl from the farm of Dr. Conover Thompson, two and a half miles 

 northwest of Freehold, on the head ivaters of South river. 



Description. — Colour, light-gray, with a very little tinge of green j 

 is adhesive, and has much the character of clay. 

 Composition. — In 100 parts: 



Greensand, - - - 50 



Clay, .... 40 



Quartzose sand, - - - 10 



100 



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

 greensand, is 5'7 per cent. 



Marl from the farm of William T. Sutpham, on the head branches 

 of South river, two and a half miles northwest of Freehold. 



Description. — Colour, earthy-gray, with but little tinge of green, 

 mottled and coloured with oxide of iron. 



Composition. — In 100 parts: 



Greensand, - - - 40 



Clay, - - - - 52 



Quartzose, - - - - 8 



100 



The potash in this marl, deduced from that of the greensand, is 

 4-6 per cent. 



Mr. Joseph Vandeveer has opened pretty extensive pits, about 

 half a mile to the north and west of Bucks. The marl is much 



