Manchester Memoirs^ Vol. XL VIII. 



Plate X. 



Same as Plate IX., Fig: 2, but using solutions containing J^fth instead 

 of xVirth of a grain per gallon without cooling. 



I I |!| t I 5 amperes 



withotit cooling 



blank with- with with amyl alcohol and 



out 



amyl alco- i 2 5 lo 20 grammes glucose, 

 hoi 



Fi^. 1. 



Fig. 2 shews arsenic mirrors, from 8 samples of beer ABCDEFGH, 

 using 25 c.c. of beer for each test, and cooling at the point at which the 

 mirror should form. 



A B C D blank A B C D 



5 amperes 

 with cooling 



H (blank E F 



Committee's 



Electrolytic Method 



working on the 



beer direct. 



Marsh-Berzelius 

 Method after com- 

 pletely destroying 

 organic matter. 



Fig. 2. 



