120 



HORTUS GRAMINEUS WOBURNENSIS. 



V. Sandy Loam, or Brompton Common Loam. 



400 grains, deprived of moisture, consisted of 

 Fine sand, partly siliceous and partly calca- 

 reous - - . - 280 grains. 

 Carbonate of lime - - - 4 

 Carbonate of magnesia - - 1 

 Decomposing vegetable matter - - 19 

 Silica - - - - 63 

 Alumina, or matter of pure clay - 15 

 Oxide of iron - _ _ _ 4 

 Soluble matter, principally vegetable extract 

 and sulphate of potash - - 4 

 Loss - - 20 



400 



Ohs, This soil affords an illustration of the term loam, in its 

 general acceptation among husbandmen and gardeners in the 

 neighbourhood of London. 



VI. Rich Black Clayey Loam. 

 400 grains of the entire soil consisted of 



VII. Clayey Loam. 



400 grains, freed from moisture, gave of 



Fine sand, partly calcareous and partly sili- 

 ceous _ _ _ - 

 Carbonate of lime . . _ 



400 



190 grains. 



Carry forward 198 



