128 



GIBBS. 



Internal Revenue Agent Ruge gatliered a number of samples of sap in Cagayan 

 which showed after fermentation 7.5 and even higher percentages of alcohol. 

 It is seen that the acidity increases with the per cent of alcohol, until the 

 maximum content of alcohol is reached. During the period of constant alcohol 

 content the acidity remains constant. Upon the decrease in alcohol content 

 the acidity continues to increase. 



Other fermentations, the most noticeable of which is the butyric, con- 

 tribute to the decreased yield of alcohol. 



hihibition of fermentations. — The sap can be preserved by the methods 

 employed with the buri sap ^® and the remarks made on this point 

 regarding^ the buri sap apply equally well to the nipa. The preservation 

 of the sap for sugar making is taken up in the section devoted to that 

 subject. 



ALCOHOL PRODUCTION. 



Introduction. — ^Almost 90,000,000 liters of nipa sap were distilled 

 during the fiscal year 1910, producing 9,033,323 proof liters of alcohol. 

 The yields of alcohol obtained from the sap varied from 4.1 to 7.5 per 

 cent. The average for 33 distilleries was 5.0 per cent. The most 

 reliable data which could be obtained are given in Table X. 



Table X. — The production of sap from the nipa palm and the amount of alcohol 

 obtained therefrom during the year 1909 " hy some of the distilleries in the 

 districts where the production is greatest. 



PAMPANGA AND BULACAN PROVINCES. 



Distil- 

 lery. 



Period of nipa tuba production. 



Tuba 



distilled in 



liters. 



Yield of 

 alcohol in 

 proof liters. 



Per cent 

 of alco- 

 hol ob- 

 tained 



from the 

 tuba. 



1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



10 

 11 



July 1, 1909, to February 20, 1910 _ . . . _ 



4, 726, 389 

 4, 326, 942 

 9, 996, 052 

 6, 527, 696 

 3, 362, 242 

 11,807,615 

 7,239,418 

 5,277,615 

 8,754,356 

 1, 707, 732 

 208, 500 



612, 540 

 342, 694 



1,225,516 

 719, 394 

 306, 312 



1, 271, 470 

 965, 679 

 675, 436 

 805, 400 

 224, 693 

 21, 713 



6.5 

 5.0 

 6.1 

 5.5 

 4.5 

 5.4 

 6.7 

 6.4 

 4.7 

 6.6 

 6.0 



. _do - — - 



do - 



do — 



do 



do 



.. do - 



do . .. 



October 10, 1909, to February 28, 1910 



August 2], 1909, to January 31, 1910 _.. 



July 1, 1909, to November 30, 1909 ... . 





" The data for the entire year of 1909 were not available. Commencing July 1, 

 1909, records were kept. The periods above recorded include the annual season from 

 July to February, which is the duration of the greatest production of tuba from the nipa 

 palm. 



^ See the chapter on the buri palm. 



