278 



The amount of potash in this marl by absolute analysis, is 

 10*35 per cent. 



Marl from the farm of Josiah Heritage, two and a half miles 

 east of Barnesborough, Gloucester county. 



Description. — Colour, dark olive-green ; washed granules still 

 darker, approaching to black ; size, rather large. 

 Composition. — In 100 parts: 



Greensand, . _ _ 93-70 

 Clay, .... 6-30 

 Quarlzose sand, - - none. 



10000 



The proportion of potash in this marl, by analysis, is 10*4 per 

 cent. 



Marl from the farm of Joseph Clarke, three quarters of a 

 mile east of Barneshorough. 



Description. — Colour, very dark greenish gray ; the washed 

 grains, quite coarse and of a dark sea-green colour. 



Composition. — In 1 00 parts : 



Greensand, . . _ 84-31 

 Clay, - - - 14-69 



Quartzose sand, - - 1-00 



10000 



The proportion of potash in this marl, by direct analysis, is 9-8 

 per cent. 



Marl from the farm, of Mr. Hoffman, one mile and a half 

 from Barneshorough. 

 Description. — Colour, rich verdigris green, granular ; washed 

 grains unchanged. 



Composition. — In 100 parts: 



Greensand, . - _ 85-58 

 Clay, .... 13-42 



Quartzose sand, - - 1-00 



100-00 



