166 CASEIN. 



containing about 100 parts of casein, and 10 of a 10 per cent, 

 solution of ammonia, in 2,000 parts. About 30 parts of a 

 40 per cent, solution of formaldehyde are added, and the 

 casein is dried as stated above. 



This waterproof casein may be used in various industries, 

 for instance, photography, papermaking and the preparation 

 of surgical bandages. 



