[SHUTT & CHARRON] MOISTURE IN HONEY 45 
TABLE IX. LEVULOSE (KAHLBAUM), DRYING IN PLATINUM DISHES ON (a) SAND, 
AND (6) ASBESTOS, IN PARTIAL VACUUM AT 60° C. 
Levulose, 5°2228 grams in 100 c.c. 
10 c.c. used in each determination — 0°52228 grams. 


ABSORBENT Shape of 21 25 43 48 
MATERIAL Dish Hours Hours Hours Hours 
Sand EÈE: "543 "525 "525 525 
R.B. “905 * 528 "528 "528 
Asbestos F.B. *539 “510 *510 “509 
R.B. “534 *507 *506 “505 


GENERAL DEDUCTIONS FROM DATA IN TABLES VI. To IX. 
The results given in Table VI. show a considerable loss due to 
decomposition on drying a mixture of dextrose and levulose on asbes- 
tos for 48 hours at 98° C.— and this loss constantly increased. Ata 
temperature of 70° C. (atmospheric pressure), 8 hours drying was 
insufficient, but an additional period of 12 hours proved too long. 
From Table VII. it is apparent that a temperature of 75° C. to 
80° C.— using asbestos and drying in a partial vacuum — is too high. 
A drying period of 8 hours ‘was sufficient to show that decomposition 
had commenced. Under the same conditions, but at 70° C. a period 
of 12 hours furnished results indicating a thorough desiccation of the 
levulose but no decomposition. Further drying, however, undoubt- 
edly caused dehydration of the sugar. 
In the results of Table VIII. the relative value of sand and 
asbestos as absorbent materials is compared at 70° C. to 75° C. As 
in the case of honey, we find that with asbestos there is a greater loss 
on drying than when sand is used. In 24 hours the loss through 
decomposition, using sand, is about 1-4 per cent, whereas with asbestos 
it is approximately 3:4 per cent. At 48 hours these losses, respec- 
tively, are practically 3:1 per cent and 4°6 per cent. 
The data furnished in Table IX. are indicative that 25 hours 
drying in a partial vacuum at 60° C. on sand is sufficient for desicca- 
tion of the levulose, and that there is no decomposition or further 
loss on continued drying. In the case of asbestos, under the same 
conditions, there appears to be decomposition (between 2 per cent 
and 3 per cent) of the levulose. It is evident that even at this low 
drying temperature sand is the preferable absorbent. 
