284 The Philippine Journal of Science 1919 
The results shown in Table V demonstrate conclusively the 
advisability of expressing the oil from the kernels of freshly 
gathered nuts, and of avoiding as much as possible long storage. 
These precautions should be strictly followed to ensure the pro- 
duction of a clear, light-colored oil, low in free fatty acids. The 
properties that make this oil so sensitive are the ones that make 
it valuable. The excellent drying qualities of this oil have been 
already reported.® 
Lumbang. banucalag nuts may be crushed and finely ground 
in an oil mill and the oil expressed directly from the crushed 
nuts. However, this procedure is even less commendable than 
in the case of lumbang bato; in the first place, the oil thus ob- 
tained is dirty, highly contaminated with shell particles, and 
darker colored; in the second place, the acid value is relatively 
higher, as shown in the following test: 
From one sample lot of banucalag nuts two samples of oil were 
taken; in one case the oil was expressed from the kernel after 
separating the shell, and in the other case from the crushed 
nuts without separating the shell from the kernel. After one 
week the sedimentation by gravity was complete, and the two 
samples of oil were clear. The acid value of the first was 3.65; 
that of the second, 10.65. 
The better quality of oil obtained when extraction was made > 
from the kernels fully justifies the relatively small amount of 
additional work required to separate the kernel from the shell of 
lumbang banucalag nuts. Clear oil may be obtained, either by 
sedimentation or through filter presses, and kept in air-tight 
containers for storage. 
The fertilizing value of lumbang banucalag cake compares very 
favorably with that of lumbang bato cake, as will be seen by a 
comparison of Tables VI and IV. 
TABLE VI.—Fertilizing value of lumbang banucalag cake from kernels and 
crushed nuts. 
Cake | fromm 
from | crushed 
kernel. itis 
Per cent.| Per cent. 
Molature 22.25... 2 SR yee nat Ey ete reas REN a 1.67 9.45 
Nitrogen (Na) 222522622 a ee eee ee 6.20 2.99 
Potash (E20)... ee 1.79 0.90 
Phosphorus (POs). ce eae ani 1.18 0.95 
° Aguilar, R. H., Philip. Journ. Sci. § A 12 (1917) 235. 
