1 8 8 Coffee Planting. 



with a sheathing of punched copper, being thus not 

 unlike a nutmeg-grater on a large scale. This 

 cylinder, which would be about one foot in diame- 

 ter, is made so as to revolve inversely towards two 

 bars or " chops " faced with iron, the one placed 

 above the other with a space of about T V^ ns f 

 an inch between them. The upper chop is so 

 shaped that while its lower edge is no more than 

 the thickness of an ordinary lead pencil distant 

 from the punched protuberances of the cylinder, its 

 face slopes backwards so as to leave a rapidly 

 widening space upwards, to allow the fruit to fall 

 readily in between it and the cylinder. The lower 

 chop, on the other hand, has its upper edge so close 

 to the copper that nothing thicker than a sheet of 

 brown paper would pass between the two. The 

 effect of this adjustment is that, in course of rapid 

 revolution, the cylinder compresses the berries 

 sharply against the upper chop, by which means 

 the beans are forced out, and pass out in front over 

 the lower chop. The skin or pulp, on the contrary, 

 being penetrated by the rough points of the copper, 

 adheres to the cylinder, and is carried round past 

 the lower chop (the space between which and the 

 , cylinder is too small to allow any of the beans to 

 go with it), until washed off by the flow of water 

 which is constantly passing into the machine from 

 above, with the fruit. 



