CASEIN : ITS ORIGIN, PREPARATION AND PROPERTIES. 17 



ing. The liberated moisture escapes through the discharge 

 outlet. 



The Passburg drying apparatus (Fig. 7) is fitted internally 



with a rotary system of tubes, which also serves to mix, 

 advance and dry the contents of the drum. The heating 

 efficiency of this apparatus is high and results in high drying 



capacity. It may be heated by either live or exhaust steam. 



2 



