THE SEPARATION OF THE CRYSTALS. 



Composition of Sugars. The isolated examples of analyses often 

 found quoted in text books are of little interest, as not necessarily denoting 

 the average of the district whence they come. 



The figures published by the Java Experiment Station would indicate 

 an average content of over 97 per cent, in the refining grades ; the per cent, of 

 water is not stated. Hawaiian sugars are of similar polarization and contain 

 about '8 per cent, water. Similar sugars are doubtless made in other 

 progressive sugar districts; muscovados or common process sugars are of very 

 variable quality, but about 90 per cent, sugar would be a fair average. Low 

 sugars, i.e., under 95 polarization, have now a very restricted output. 



The other bodies present, glucose, ash and organic non-sugar, vary within 

 wide limits ; in refining crystals neither the glucose nor ash often reach 1 per 

 cent., bnt they amount to 2 per cent, and over in low grades. The plantation 

 refined sugars, produced in quantity in Mauritius and Java and elsewhere,, 

 often polarize as high as 99*6 at 30C., and are hence almost pure ; they 

 contain only traces of ash, glucose, water, and organic non-sugar. 



REFERENCES IN CHAPTER XVIII. 



1. I.S.J., 98. 



2. Bull. 21, Agric. H.S.P.A. 



3. Bull. 9, Path. H.S.P.A. 



4. I.8.J., 99. 



5. 8. C. y 390. 



387 



