20 BULLETIN 49, HAWAII AGRICULTURAL EXPERIMENT STATION. 



each. Concentrated lime juice, which is prepared mainly for the pur- 

 pose of reducing bulk and consequently the freight charges entailed 

 in the shipment of the raw juice, is exported for use in dye works 

 and pure chemical preparations. Citrate of lime or calcium citrate 

 is replacing concentrated lime juice as a commercial product. When 

 properly prepared it can be shipped anywhere in paper-lined barrels 

 and will keep indefinitely in storage. Citric acid is obtained from 

 the citrate of lime by adding dilute sulphuric acid, which removes 

 the lime and leaves the citric acid in solution. Citric acid has 

 many uses. A very volatile essential oil of high flavor is obtained 

 from the rind of the lime. Lime oil is in demand for flavoring ex- 

 tracts and for perfumery. 



The rapidly increasing population and widespread demand for the 

 lime fruit seem to assure local development of the lime-fruit industry. 



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