392 The Philippine Journal of Science m* 



The data in Table XII were obtained from 10 sets of nipa palms 

 representing about 200 plants. The composition of the juice 

 as it issues from the palm is tabulated under "original juice." 

 Samples of this juice after analyses were preserved by the 

 addition of 10 per cent by volume of lime cream containing 

 0.5 per cent sodium bisulphite and having a density of 36° 

 Brix. These samples were thoroughly mixed to insure uniform 

 distribution of alkalinity, and were preserved in clean bottles. 

 The composition after varying intervals of time is recorded 

 under the heading "bottled juice." 



Juice was also collected from the same palms in tuquils coated 

 with lime cream containing sulphite as above. The contents 

 of these tuquils were poured into bottles at the time of collec- 

 tion, and analyzed after varying intervals. The data so obtained 

 are recorded under the heading "tuquil juice." The sap collected 

 in tuquils from the first 3 sets especially showed acidity in the 

 upper layers. A lime cream of 46° Brix was used in the remain- 

 ing 7 sets, as this consistency adheres better to the sides of the 

 vessels and lessens stratification. 



The samples of juice collected in bottles and subsequently 

 treated with lime and sulphite clearly show that once the juice 

 is uniformly mixed with this preservative no further deteriora- 

 tion of importance will take place. The use of sulphite in the 

 lime cream has the further advantage of adding nothing to the 

 cost of manufacture. The sulphite may be added to the lime 

 at the mill by making the lime cream of proper consistency and 

 running into it the requisite amount of sulphur dioxide. This 

 will obviate the necessity of bleaching when the juice is worked 

 up. The amount of sulphur dioxide best suited to the purpose 

 will have to be determined by experiment in actual practice. 



THE MODIFIED BAMBOO TUQUIL 



We have carried out a series of experiments using a modifica- 

 tion of the bamboo tuquil for gathering nipa juice that gives an 

 even distribution of alkalinity throughout the entire collection. 

 The lime and sulphite cream was placed in the bottom of tuquils, 

 no care being necessary to have a layer clinging to the sides. 

 The juice was then allowed to drop into small funnel tubes 

 reaching to the bottom of the tuquils and terminating in bevel 

 ends to allow free exit of the juice. This resulted in carrying 

 the entire collection of sap to the bottom of the tuquils, where it 

 immediately became alkaline, and future change was perma- 

 nently prevented. There is no possibility when funnels are used 

 for the formation of dense layers of juice containing a large 



