DESICCATED COCONUT INDUSTRIES 143 



between vertical boards and alternately squeezed 

 and shaken up. The oil that runs from the sacks 

 is free from water and very clear." 



A fully -equipped, up-to-date factory, pos- 

 sessing crushing mills and desiccating machines, 

 can, says an expert, be erected for about 7,000, 

 and a well- organised copra company can make 

 such an installation a very profitable pro- 

 position. 



A considerable portion of the oil produced 

 is obtained by this process of powerful pressure. 

 When warm, the yield is greater, but when cold 

 the oil is of finer quality and better colour ; there- 

 fore oil intended for edible purposes is invariably 

 cold-pressed, but for other purposes the process is 

 effected by heat. Everything, of course, depends 

 upon the object in view. Sometimes oil and 

 feeding cake are required ; at others oil and 

 fertiliser. ' When a cattle cake is desired, then 

 the oil is perhaps more safely obtained by expres- 

 sion ; but if the residue is only required as a ferti- 

 liser, or would become a waste product, then more 

 satisfactory results are obtained by means of a 

 solvent." The sole material difference in the two 

 methods lies in the yield of oil obtained ; the ex- 

 pression process secures only a proportion of the 

 oil, the balance remaining in the cake. By the 

 extraction process practically all the oil is re- 

 covered, and the cake retains none. 



