ACIDITY IK DETERMINING SOUNDNESS OF CORN. 5 
REAGENTS. 
(1) Eighty per cent alcohol: The specific gravity of commercial 
95 per cent alcohol is about 0.816. To make 80 per cent alcohol put 
Fig. 4.— Automatic burette of 50 e. e. capacity 
used in adding 80 per cent alcohol. Hy- 
drometer and cylinder used for preparing 
alcohol shown at the right. 
Fig. 5.— Squibb's automatic 50 c. c. burette. 
the 95 per cent alcohol in any tall glass container, preferably a 
cylinder, and add water little by little until the hydrometer reads 0.86. 
Be careful to mix thoroughly after each addition of water. 
