ANALYTIC PROCESSES 2$ 



houses. As corrosive vapors are given off, it 

 must be placed under a hood; but a special 

 form of apparatus is now made which does not 

 require an escape-pipe. 



When the liquid has become colorless or very- 

 light straw yellow, it is allowed to cool, diluted 

 with ICO c.c. of water if the smaller form of 



Pig. I. 



flask has been used, the liquid transferred to 

 the distilling flask, and the digestion flask rinsed 

 with two portions of water, 50 c.c. each, which 

 are also transferred to the distilling flask. With 

 the larger form of flask the dilution is made at 

 once by the cautious addition of 200 c.c. of 

 water. Granulated zinc, pumice stone, or 0.5 



