78 The Cultivation and Preparation of Coffee 



2nd. Its capacity is larger compared with 

 other machines of similar size. 



3rd. The husks and dust are completely 

 withdrawn from the coffee after 

 husking and polishing. 



4th. The coffee is not heated, thus retain- 

 ing its natural colour much longer 

 than coffee treated in any other 

 machine.* 



5th. And what is most important, the 

 wearing parts of the machine are 

 only lining castings of small dimen- 

 sions, which can easily be replaced, 

 instead of having to replace com- 

 plete cylinders and cones, this being 

 the case in nearly all the other 

 machines. 



The advantages mentioned are improve- 

 ments introduced by Mr. Okrassa on his 

 previous machine, which, practically speaking, 

 was not by any means a perfect machine ; and 

 I believe this is why we have not heard much 

 about it. I have seen both the old and the new 



* According to Dr. Ure, coffee contains vegetable ftbrine, fatty 

 matter, coffeine and legumine, aud by exercising excessive pressure on the 

 coffee, the valuable oil or fatty contents are brought to the surface of the 

 beans and naturally evaporate in a short time ; that is the reason why 

 the polishing imparted by all the polishers but the Okrassa is not lasting. 



