258 KR. H. Chittenden—Dehydration of Glucose. 
ever of the intestine, is much greater in this case than that of the 
stomach; which, according to Pavy, accounts for the early discovery 
by Bernard of the well known action of the intestine on cane sugar. 
Bernard supposed dextrose to be formed, but Pavy shows that maltose 
or a body resembling maltose in reducing properties, is-the usual 
product and that glucose or dextrose is formed only in the presence 
of considerable ferment. The ferment which produces this change, 
unlike the ferment which acts upon glucose, is situated on the surface 
of the mucous membrane and thus frequently the contents of the 
stomach are likewise found to possess transformative power. 
Fifth experiment.—A rabbit with stomach partially filled with 
food was killed, the stomach rinsed with water, then minutely divided 
and separated into two equal parts. One portion was placed in con- 
tact with 0°195 gram of glucose in 75 ¢. c. of water, while the other 
portion was mixed with a like amount of pure saccharose, also in 75 
c.c. of water. A portion of the small intestine was likewise finely 
divided and one portion placed in contact with 0°195 gram of glucose 
in 75 c. c of water and the other portion with 0:200 gram of saccha- 
rose dissolved in 75 ¢. c. of water. All four mixtures were warmed at 
48°8° C. for two hours, then heated to boiling with the addition of 
sodium sulphate and finally each brought to a volume of 100 c.¢, 
25 c.c. of the saccharose solution, which had been in contact with 
the stomach tissue, gave no reduction whatever with Fehling’s solu- 
tion. 25 ¢.¢. of the saccharose-intestine solution, however, gave 
0:0726 gram Cu, equivalent to 00371 gram dextrose. 
With the glucose solutions, the following results were obtained : 
STOMACH. 
a. Before treatment with sulphuric acid. 
25 c,c. gave 0°0906 gram Cu =0°0462 gram dextrose x 4=0°1848 gram dextrose. 
b. After treatment with sulphuric acid. 
25 c.c. gave 00889 gram Cu =0°0454 gram dextrose x 4==0°1816 gram dextrose. 
INTESTINE. 
a. Before treatment with sulphuric acid. 
25 c.c. gave 0°0712 gram Cu =0°0364 gram dextrose x 4==0°1456 gram dextrose. 
b. After treatment with sulphuric acid. 
25 c.c, gave 0°0689 gram Cu =0°0353 gram dextrose x 4==0°1412 gram dextrose. 
With glucose, the same results are to be observed here as in the 
preceding experiments; the only variations in reducing power, before 
and after treatment with sulphuric acid, being such as would come 
within the ordinary limits of error. In one single case, a transforma- 
