256 
K. MIYAKE & T. TADOKORO. 
formed. The crystals were separated by filtration with suction, washed with 
a small amount of 75% alcohol and finally recrystallized from 95% alcohol. 
The product obtained in this manner was perfectly white and weighed 0.392 
gram when dried over sulphuric acid in vacuum. The melting point was 
found to be 170° which coincides with that of arabinosebenzylplienylhydra- 
zone. 
0.2035 gram of the substance was dissolved in 50 c.c. of methyl alcohol 
and polarized in a 200 mm. tube. A laevo-rotation of 0.3 on the scale was 
observed. The specific rotatory power is 
(a)D — °- 1 2 3 4 x °- 346 . x 50 — —12.7° (at 16°) 
v ’ 0.3035x2 V ’ 
The specific rotatory power of arabinosebenzylphenylhydrazone according to 
van Ekenstein and de Bruy n° is -14.6°, while Bro w n and Tollen s v 
as well as Osh ini a* 0 found it to be -12.1°, -12.6°. Consequently, it will 
be clear that the isolated benzylphenylhydrazone is that of arabinose. 
From the above tests, it is evident that in the hydrolysis products of 
the shoots, both xylose and arabinose are present and consequently, that the 
pentosan of the shoots is made up of both xylan and araban, which are 
anhydrous condensation products of the pentoses. 
Sugar of the shoots. 
Although the amounts of sugar in bamboo shoots have been given in 
nearly every analysis hitherto reported, its nature'* 5 has been left untouched 
for future study. With a view of elucidating this phase of the question, the 
following experiments were undertaken. 
500 grams of finely chopped edible portion of the fresh shoots were put 
into a large flask containing 800 c.c. of 95% alcohol. After standing for a 
1) Ber. D. Chem. Ges., Berlin, 29 (1897), Ref. pp. 911—913. 
2) ibid, 35 (1902), pp. 1457—1467. 
3) Journ. Sapporo Agric. Coll., Sapporo, 2 (1906), p. 94. 
4) Shibata (l.c.) makes mention of glucose but from the nature of the methods follow- 
ed by him it is not easy to decide whether the sugar under question is glucose or other 
reducing sugar. 
