393 
are mentioned in the details of the experiment are here 
given for the above purpose. 
1st. By I * * * * 6 loam’ is meant any of the earths combined with 
decayed animal, or vegetable matter. 
2d. £ Clayey-loam/ when the greatest proportion is clay. 
3d. £ Sandy-loam/ when the greatest proportion is sand. 
4th. £ Brown loam/ when the greatest proportion consists 
of decayed vegetable matter. 
5th. £ Rich black loam/ when sand, clay, animal, and 
vegetable matters are combined in unequal proportions, the 
clay greatly divided, being in the least proportion, and the 
sand and vegetable matter in the greatest. 
The terms c light sandy soil/ £ light brown loam/ See. are 
varieties of the above, as expressed. 
Observations on the chemical Composition of the nutritive 
Matter afforded by the Grasses in their different States. . 
By the Editor. 
I have made experiments on most of the soluble pro- 
ducts supposed to contain the nutritive matter of the grasses, 
obtained by Mr. Sinclair ; and I have analysed a few of 
them. Minute details on this subject would be little inte- 
resting to the agriculturist, and would occupy a considerable 
space; I shall therefore content myself with mentioning 
some particular facts, and some general conclusions, which 
may tend to elucidate the inquiry respecting the fitness of the 
different grasses for permanent pasture, or for alternation 
as green crops with grain. 
The only substances which I have detected in the soluble 
matters procured from the grasses, are mucilage, sugar, 
bitter extract* a substance analogous to albumen, and 
different saline matters. Some of the products from the 
after-math crops gave feeble indications of the tanning 
principle. 
The order in which these are nutritive has been men- 
tioned in the First Lecture ; the albumen, sugar, and mu- 
cilage, probably when cattle feed on grass or hay, are for 
