279 



The proportion of potash in this marl derived by direct ana- 

 lysis, is 9-5 per cent. 



Marl from the farm of John Gaunt, one mile and a quarter 

 west of Barneshorough. 

 Description. — Colour, dark gray, somewhat tinged with oxide 

 of iron ; granules large, and when washed of a dull earthy 

 colour. ^ 



Composition. — In 100 parts: 



Greensand, ... 82-45 

 Clay, .... 17-55 



Quartzose sand, - - none. 



10000 



The proportion of potash deduced from that of the greensand, 

 is 94 per cent. 



Marl from, the farm, of James Jehnes, one mile and a quarter 

 west of Barneshorough. 

 Description. — Colour, pale yellowish green, somewhat clayey 

 and cohesive in texture ; the washed grains are dark green and 

 of medium size. 



Composition. — In 100 parts: 



Greensand, - - - 90-22 



Clay, - . - . 8-78 



Quartzose sand, - - 1-00 



100-00 

 The proportion of potash which this marl contains as deduced 

 from that in the greensand, is 10-1 per cent. 



At Carpenter's Landing, and about one hundred yards north of 

 Mantua creek, the blue clay, containing a small proportion of the 

 green granules and much siliceous sand, displays itself upon the 

 road where the top of the stratum holds up and discharges the 

 water. It is seen very generally upon the side of the marl tract 

 next the river, and may, in nearly every instance, be known by 

 the water which it throws out, and the astringent impregnations 

 contained in it. 



