126 



GIBBS. 



Table IX. — Analyses of tuba collected iy native gatherers {samples taken aifter 

 arrival at the distilleries) . 



Sam- 

 ple 



num- 

 ber. 



Density 

 15° 

 15°' 



Solids. 



Ash. 



Acidity 



as 

 acetic. 



■ Su- 

 crose. 



Reduc- 

 ing 

 sugars. 



Alco- 

 hol.« 



Remarks. 



1 



2 

 3 



4 



1.0070 



1.00.57 

 1.0029 

 1.0075 



3.39 



2.41 

 2.05 

 2.67 



0.57 



0.72 

 0.75 

 0.71 



0.81 



1.19 

 0.91 

 0.94 



0.5 



0.0 

 0.0 

 0.0 



0.53 



Trace. 

 0.0 

 0.0 



6.40 



5.65 

 6.30 

 6.20 



8 hours after collection from 

 the trees. 



24 hours after. 



1 Collected early in the morning 

 J and bottled at 8.30 a. m. 



" Analyses obtained by Ayala and Company showed the alcohol content of six samples 

 as received at the distillery to vary from 1.79 to 5.67 per cent. The average was 3.36 

 per cent. 



Sample niiinber 1, was collected from a distillery in Bulaean and numbers 2, 3, 

 and 4 from three distilleries in Pangasinan. 



The rapidity of the fermentation of a sample collected according to 

 the native methods in dirty bamboo receptacles is shown by the follow- 

 ing analyses : 



Time in- 

 terval in 

 hours. 



Per cent 

 alcohol 

 by vol- 

 ume. 



Acidity, 



inlOOcc. 



As 

 acetic. 



6 

 13 

 29 

 35.5 

 52 

 58 



3.70 

 6.40 

 6.85 

 6.85 

 6.80 

 5.95 



50 

 •56 

 64 

 66 

 66 

 120 



0.300 

 0.336 

 0.384 

 0.396 

 0.396 

 0.720 



A sample taken in a distillery from a tank which had just been filled 

 with tuba collected ten hours before^, showed the following change in 

 alcohol and acid content : 



Time in- 

 terval in 

 hours. 



Per cent 

 alcohol 

 by vol- 

 ume. 



Acidity. 



«-i- 



1 

 As 

 acetic. 



10.0 

 12.5 

 14.5 

 16.5 

 31.0 

 39.0 

 40.0 

 57.0 

 65.0 

 89.0 



3.00 

 4.00 

 4.50 

 4.50 

 4.50 

 4.50 

 4.50 

 4.50 

 4.50 

 3.90 







74 

 74 

 74 

 84 

 85 

 85 

 85 

 85 



0.444 

 0.444 

 0.444 

 0.504 

 0.510 

 0.510 

 0.510 

 0.610 







