ACIDITY IN DETERMINING SOUNDNESS OP 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 buretteof 50c. c. 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. 



