VIII, A, 6 



Pratt et al.: Nipa Palm 



389 



Table XI. — Analyses of 24-hour collections with lime and sulphite. 



Composition of uncarbonated samples. 



No. 



Brix. 



Polariza- 

 tion. 



Sucrose. 



Purity. 



1 _ 



12.0 

 8.7 

 11.0 

 13.0 

 11.7 

 11.9 

 14.7 

 10.7 

 12.6 

 12.2 

 13.1 

 10.9 

 12.0 

 11.7 

 12.5 

 11.8 

 11.7 



V.° 

 40.1 

 27.7 

 34.1 

 45.6 

 34.5 

 38.1 

 50.2 

 31.2 

 39.6 

 30.8 

 40.9 

 30.8 

 40.1 

 36.7 

 39.6 

 38.9 

 39.6 



Per cent. 

 9.9 

 7.0 

 8.5 



11.3 

 8.6 

 9.5 



12.3 

 7.8 

 9.8 

 7.6 



10.1 

 7.7 

 9.9 

 9.1 

 9.8 

 9.6 

 9.8 



82.5 

 80.4 

 77.2 

 86.9 

 73.5 

 79.8 

 83.7 

 72.9 

 77.8 

 62.3 

 77.1 

 70.6 

 82.5 

 77.8 

 78.4 

 82.7 

 83.7 



2 



3 



4 _ - 



5 _. 



6 . . 



7. 



8 



9 



10 



11 



12 



13 



14 — 



15 



16 



17 









9.3 



78.8 









The composite sample resulting from the juices tabulated in 

 Table XI showed a rise in purity of 4 after carbonation. In- 

 creasing the average of Table XI by this amount gives a purity 

 of 82.8, or only 2 lower than the corresponding average of Table 

 IX, for original juice from the same palms. The sugar content 

 and Brix are decidedly lower, due to dilution caused by the lime 

 and sulphite cream. The behavior of sample 10 is especially 

 noteworthy. The juice flowing from this palm gave a strong 

 reaction for peroxidase, and could not be collected in a sterile 

 bottle for analysis without spoiling. With lime and sulphite the 

 sample appeared to have undergone no deterioration, although 

 the purity of the sample was very low. It is probable that the 

 original juice of this palm was of no value, but the results 

 obtained in an extreme case are significant. 



EXPERIMENTS IN OTHER SWAMPS 



Experiments on a large scale were carried out in one swamp 

 further to test the efficiency of lime cream and sulphite as a 

 preservative. Unfortunately, these tests were made during the 

 month of February when the nipa in this district produces a 

 small second crop of flower stalks. Consequently, few short 

 stems were encountered, and a large excess of thick lime cream 

 without sulphite appeared to be sufficient for preserving the 

 juice. Little or no peroxidase was found in the sap from these 

 plants. The data obtained are found in Table XII. 



