Memoir on the Saccharine Diatletes. ‘103 
this principle even in a remarkable degree ; but these sub- 
stances always hold some acid in their composition, from 
which they may be freed by combining it with an alkaline 
or earthy base, or a metallic oxide, according to the nature 
of the acid; and consequently this mode of separation may 
be generally employed. 
It is in this manner that we may ascertain if the honey- 
like substance observed upon the leaves of certain trees, and 
- particularly on those of the linden tree, is in reality a kind 
efamanna; and if the saccharine principle which exists in 
asparagus is of the same description; it having been latcly 
discovered by Messrs. Vauquelin and Robiquet, that im aspa- * 
ragus the saccharine substance is mixed with a principle en- 
tirely peculiar *. 
Analysis of the Urine evacuated by the Patient from the 
Time, he was brought. to the Infirmary of the School of 
Medicine until he went out cured. 
~ During the whole time the patient was in the Hotel-Dieu 
he could not be ‘subjected to any particular regimen. He 
lived as he pleased; his disease therefore ahainea station- 
ary, and his urine, at all times very abundant, was never 
changed in its nature. It was then resolved to carry him to 
the Infirmary of the School of Medicine, where, being al- 
most’ continually watched by M. Dupuytren and his pupils, 
it became easier to make him do whatever he was desired. 
After a few days all kinds of vegetables were refused, and 
animal food only was given him. The weights of what he 
ate, and of the liquids he drank to quench a most dreadful 
thirst, were ascertained. 
For the first two or three days no change was remarked 
in his urine; but in five’ or six days it became less white, 
sharper, more acid, and less saccharine ; when submitted to 
evaporation, in place of continuing limpid as before, it be- 
came turbid, and was covered with a thick pellicle of albu- 
minous matter. When I perceived this change, particularly 
the presence of an animal matter in his urine, although the 
* The paper here referred to will be given in a subsequent number. 
G4 state 
