BOILING OP LIQUIDS IN GLASS VESSELS. 
329 
taste. When sweetened with sugar, it is not at all dis- 
agreeable. 
The principal inconvenience attending this form of ad- 
ministration, is, that the decoction soon undergoes decom- 
position. This may, to a certain extent be prevented, by- 
adding a small quantity of sulphuric acid, which precipitates 
the mucilage, or by the addition of spirit. 
According to Dr. Dnchassaing, this remedy produces no 
• appreciable disturbance to the nervous system. In some 
cases he has observed that it renders the pulse rather less 
frequent. It improves the appetite, and causes a determi- 
nation to the skin. 
In a great number of cases in which it has been applied 
as a remedy for intermittent fevers, it has proved eminently 
serviceable. — Pharm. Journ. 
ART. LXXIL— NOTE ON THE BOILING AND DISTILLATION 
OF LIQUIDS IN GLASS VESSELS. 
By Mr. Theophilus Redwood. 
Professor of Chemistrj and Pharmacy to the Pharmaceutical Society. 
In a communication made to the Pharmaceutical Society 
about two years ago, On the influence of Cohesion and 
Adhesion on the Boiling and Evaporation of Liquids," and 
which was published in this journal, vol. vi., page 119,1 
alluded to some cases in which it is found difficult to effect 
the distillation of liquids in glass vessels. This difficulty 
arises from the occurrence, in certain liquids, of the phe- 
nomenon commonly called humping. It is frequently ex- 
30 
