Analytical Chemistry. 117 
Sugar and dextrin are brought into such a condition that simple washing 
with alcohol or water suffices to remove them completely. The chief 
rt of the phosphoric and silicic acids is likewise rendered soluble. 
The starch grains are not affected, neither does the cellulose undergo al- 
teration, either qualitatively or quantitatively. In fact this treatment 
alcohol of 8-10 per cent, to prevent the swelling up of the residue 
When the substance is completely washed, the filter and its contents are 
dried, first at 120° and finally at 212°. The loss consists of albuminoids, 
fat, sugar and a part of the salts of the substance, and when the last 
The filter with its contents is now reduced to powder or shreds, and 
the whole is heated with water containing 5 per cent of hydrochloric acid 
Ment with potash leaves the stare grains in such a state of purity from 
tnerusting matters, that their conversion into dextrin proceeds with great 
y acted upo 
_ drochlorie acid, after washing and drying, the amount of cellulose, cor 
gin, gum and insoluble mineral matter is found. By subtracting these 
from the weight of the substance after exhaustion with potash, the quan- 
ret eae is however so small as rarely to be appreciable. If need 
ietnerating and weighing the residae. By warming with concentrated 
{132° 
the residue should be washed with water to which some alcohol has 
