92 
K. OSHIMA. 
4) It produced neither mucic acid nor saccharic acid, upon oxidation 
with nitric acid of 1.15 sp. gr. 
5) It gave no ketose reaction with resorcin and hydrochloric acid. 
6) It produced no characteristic mannose-phenylhydrazone with 
phenylhydrazin. 
7) 5 drops of the syrup were placed on an object glass and were 
seeded respectively with a crystal of xylose, arabinose, dextrose, 
galactose and mannose. After 36 hours, the drop seeded with 
xylose showed the formation of new crystals, while all the rest 
remained unchanged. 
From the above reactions it is safe to conclude that the syrup did not 
contain any dextrose, levulose, galactose or mannose. On the other hand, 
the presence of xylose was highly probable. To ascertain its presence, 
BERTRAND’S reaction 1) was made use of. 
5 grams of the syrup were dissolved in 15 c.c. of water, in a small flask, 
and 7 grams of cadmium carbonate and 3 grams of bromin were added and 
well mixed. After standing for 20 hours, the mixture was warmed and 
when all the bromin was driven out it was heated to boiling, filtered hot and 
the residue washed with hot water. The filtrate was concentrated, and when 
nearly dry, 25 c.c. of 95% alcohol were added. After about half an hour, the 
formation of fine crystals was observed. When examined under microscope, 
the crystals proved to be the characteristic boat shaped needles of cadmium 
bromoxylonate. After a few hours, the crystals were separated from the 
mixture by spreading upon an unglazed porcelain plate. These were then 
recrystallized from alcohol, using animal charcoal. Perfectly white crystals 
were thus obtained, which on filtering were washed with alcohol and ether 
and finally dried over sulphuric acid in vacuum. 
Analysis of the cadmium salt was made 
with the following result : 
0.2480 gm. substance gave 
0.0948 gm. Cd S. 
0.3158 „ 
0.1575 „ AgBr. 
For (C 5 H 0 O 6 Cd Br + H 3 0 )i' 
Cd % Br % 
Calculated 
29.86 21.32 
Found ... 
29.73 21.22 
1) Paris, Bui. Soc. Chim. (3) 5 p. 554. 
1) Maquenne — Les Sucres et principaux derives, Paris, 1900, p. 815. 
Bertrand (/.r.) gives the formula (C s H 9 0 6 ) 2 Cd + Cd Br 2 + 2H 2 0. 
