Original Communications. 
bottom : at Z it is passed through a cork well fitted into the mouth 
of the bottle. The smaller end of the beak B, has a cork 
fitted into it, through which a small tube C (bent in an angle 
at its upper extremity) is passed. D is another retort beak, 
or a bottle with its bottom cut off, the larger end of which, 
Y, is fitted by means of a cork to the smaller end of B. At 
X a small bent tube K is passed through a cork fitted into D. 
The cork in the mouth of the flask E, has the end of the 
safety tube G passed through it, and also a bent tube I which 
is connected by a tube of caoutchouc with the bent tube K. 
At H is a valve to prevent any explosion when the extrica- 
tion of gas is too rapid to be absorbed ; this valve is repre- 
sented at Q, enlarged. 
The gas being generated in the flask E, passes through the 
bent tubes into D, where the aqueous vapour is condensed ; 
the resulting water is prevented from passing into B by the 
tube D. The gas passes through C and B, the latter contain- 
ing the liquid to be subjected to the action of the gas. 
The tubes I, F, and K may be replaced by a single glass 
tube, if a very corrosive gas be used. 
If a series of bottles be desirable, the condensing vessel D 
may be dispensed with, in all after the first ; a tube may pro- 
ceed from H to be connected to the tube C of the succeeding 
bottle. 
