277 



Marl from the farm of William, Skinner, near Cooperstown, 

 Gloucester county. 



Description. — Colour, dark dull green ; the washed granules 

 more distinctly green ; these are of large size. 

 Composition. — In 100 parts: 



Greensand, ... 85-63 

 Clay, .... 14-37 

 Quartzose sand, . . none. 



100-00 



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

 greensand, is 9-8 per cent. 



Within one mile of the Delaware, to the north of Cooper's 

 creek, a bed is reached having all the characteristics of that at 

 Burlington and near Spotswood. It is highly astringent, though 

 when used in moderation it has been found to be serviceable 

 upon the potato crop. Shells and shark's teeth are said to have 

 been found in it, though of this I have not been able to gel dis- 

 tinct information. 



LOCALITIES BETWEEN CAMDEN AND SALEM. 



Good marl abounds on Big Timber, Woodbury, and Mantua 

 creeks, within the limits already designated. In the vicinity of 

 Barnesborough, the proportion of greensand in the stratum gives 

 it a high degree of fertilizing power. The following analyses 

 will serve to show its composition in this portion of the tract. 



Marl from the farm of Thomas Bee, Esq., Union Cross- 

 Roads, about five m,iles southwest of Woodbury, Deptford 

 township, Gloucester county. 



Description. — Colour, rich verdigris green ; the washed grains 

 of a deeper green. 



Composition. — In 100 parts: 



Greensand, - . - 92-48 

 Clay, - - . . 7-52 



Quartzose sand, - - none. 



100-00 

 24 



