38 AGRICULTURAL TEXT-BOOK. 



120. IX. Amlyses of Shell Marl, Forfarshire, (A,) and Clay Marl, 

 Ayrshire, (B,) Scotl^, (Johnston.) 



+*f* A. B. 

 Carbonate of lime, - - 81.7 



Oxide of iron and alumina, - 0.6 2.2 



Organic matter, - ... 14.6 2.8 



Clay and silicious matter, - - - 3.1 84.9 



Water, - - 1-4 



1000 99.7 



