226 ON THE MANUFACTURE OF CHLOROFORM. 
which one h b' is so constructed as to communicate with the 
air, whilst it closes the connection of the boiler with the 
cask. A glass tube is adjusted in the boiler to indicate the 
pressure, and for supplying the boiler with water. The tube 
c c' is attached to the worm of a refrigeratory, the inferior 
extremity of which is connected with a kind of Woulf's 
apparatus, the first bottle acting as the receiver, the second 
is half full of alcohol, and the last filled with cotton satu- 
rated with alcohol. Each of them is furnished with stop- 
cocks, and long necked funnels, by aid of which you can 
empty or fill them at pleasure, without disarranging the 
apparatus. 
The operation proceeds with great readiness as follows: 
The cask or generator should hold eighty gallons. Ninety- 
two pounds of chloride of lime are introduced by means of 
the wooden funnel E, which is adjusted on the orifice A. 
The interior of the square funnel is traversed by two hori- 
zontal rollers, which, when turned, carry the chloride down- 
ward, and cruslf the lumps. Twenty-seven gallons of water, 
at 176° to 194° Fahr., are then added by the same opening, 
and the mixer, B, turned until they are thoroughly mixed. 
Immediately after, four and three-quarter pounds of alcohol 
is added, together with the alcoholic residues, and mingled. 
Ordinarily, the reaction is produced immediately, the chloro- 
form distilling rapidly. If the contrary is the case, a jet of 
steam from the boiler is allowed to pass into the cask, by 
closing the cock a and opening h. As soon as the first pro- 
ducts begin to appear, the steam is shut oif at 5, whilst a is 
again opened. From this time the progress of the operation 
should be regulated by the flow of the liquid in the recipient, 
and the rapidity of the escape of gas bubbles through the 
alcohol. The violence of the reaction may be easily con- 
trolled by adding a portion of cold water by the funnel F, 
and moving the mixer. To be fully assured that the con- 
tents of the cask do not pass over into the worm, a cork float 
