426 Report of Experiments icith different Manures 
Adopting the experimental indications which have been re- 
corded, as the most trustworthy which in the existing condition 
of our knowledge on the points in question could be supplied, 
the result upon the whole would appear to be, that, on the one 
hand, a generally low condition of elaboration of succulent pro- 
duce may still be associated with a high proportion of com- 
paratively indurated, and therefore probably innutritious Cellular 
matter, in its dry substance. On the other hand, comparing the 
produce by different manures, in one and the same season, the 
more Graminaceous, the riper, and the more stemmy, the higher 
will be the proportion of the comparatively indurated Woody or 
Cellular matter. 
Fatty Mattee. 
In the analysis of animal* and vegetable food-stuffs, it is usual 
to estimate as Fatty Matter^^ that portion which is dissolved out 
from the dried substance by means of ether. In the case of 
animal substances, or of ripened vegetable ones, such as grain, 
the substance so determined does generally represent a fatty 
matter of high respiratory and fat-forming capacity. Not so, 
however, in the case of crude, unripened, vegetable produce. 
In fact, in such produce, the so-called fatty matter separated 
merely by extraction with ether, is largely contaminated with 
waxy and green colouring matter, a considerable proportion of 
Avhich passes from the animal in its solid excrements. A rela- 
tively large proportion of such impure fatty substance can hardly 
bo regarded, therefore, as an advantage. Still, it is useful to 
ascertain the amount of such matter, if it be only that, by a 
careful consideration of the conditions of growth, and otiier 
admitted qualities of the hay yielding the larger or the smaller 
proportions of it, we may be the better able to form a valid 
decision, whether or not the substance in question if likely really 
to indicate the high condition of elaboration of the constituents, 
which a large proportion of -pure fatty matter might be supposed 
to do. A further reason for determining the amount of this sub- 
stance, notwithstanding that we consider it of such doubtful 
value, is the fact, that this mode of analysis has been adopted 
with apparent confidence by most of our predecessors; whilst 
an accurate separation of the several bodies which compose this 
Ether-extract, would have increased the labour of analysis beyond 
that whicfi our time enables us to devote to it. Nor, is the 
quantity of this impure fatty matter in hay so large, as to render 
the differences in its amount of much importance in any other 
point of view, than as indicating the general character and con- 
dition of the produce. 
Tlie method adopted by Mr. Segelcke, in his determinations 
