NOTICE RESPECTING AMIDULINE. 
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ART. XXI. — NOTICE RESPECTING AMIDULINE. 
By Prof. F. Schulze. 
I have applied the above name to a modification of 
starch which forms the transition between true starch and 
inuline or dextrine ; it is an intermediate stage, which pre- 
cedes all the metamorphoses of starch into dextrine, and is 
characterized by being readily and entirely soluble in hot 
water. It again separates from the concentrated aqueous 
solution after a longer or shorter time, owing to its insolu- 
bility in cold water ; it reacts with iodine like starch. 
This compound calls to mind Jacquelin's amylum granules, 
with which it is perhaps identical. It is distinguished 
from inuline by its reaction with iodine, and by not being 
converted into sugar on boiling its aqueous solution. It re- 
sembles dextrine in its solution, deviating the plane of 
polarization considerably to the right. It exhibits no re- 
action with lime and barytic water, nor with basic acetate 
of lead, and differs consequently in this respect from the 
so-called solution of starch. 
With respect to the preparation of this substance, the 
same method is followed as for dextrine, only, with this 
difference, that the boiling of the mixture of sulphuric acid, 
water and starch is discontinued as soon as the starch is dis- 
solved. 
The acid is neutralized with carbonate of lime while the 
liquid is still hot. After the lapse of some time, frequently 
of several days, the amiduliue separates in flakes easy of 
filtration, and which on drying assume all the appearance 
of white sago. Its elementary composition agrees exactly 
with that of starch. — Chem. Gaz. from Joarn.fur Prakt. 
Chem. 
