

DIGESTIBILITY OF CEREAL BREAKFAST FOODS. 195 
EHXPERIMENTS WITH GRAPE-NUTS. 
Experiments with Grape-Nuts were made with three subjects. 
Miesexperiments with_A. B. A. and R. D. M. began with 
breakfast, and that with EK. O. with dinner of June 24, 1903. 
The experiment with A. B. A. continued three days, with nine 
meals, and those with R. D. M. and E. O. each four days, with 
eleven meals. A. B. A. ate 120 grams of the cereal with the 
first meal, 100 grams with each of the next five meals and 50 
grams each with the remaining three meals; R. D. M. ate 100 
grams each with ten meals and 50 grams with the last meal; 
. O. ate 100 grams each with the first five meals, and 50 grams 
each with the remaining six meals. The quantities of the other 
materials eaten were less uniform. 
The data of these three experiments are given in Table 84 
beyond. 
With all three subjects the diet became decidedly disagreeable 
before the experiment ended. ‘There was considerable fermen- 
tation in the alimentary tract, accompanied by apparent irrita- 
tion of the intestine, and more or less pain, which, with one 
of the subjects, A. B. A., was so severe on the third day that 
he had to terminate the experiment sooner than was intended, 
though he managed to complete three full days before taking 
the second capsule of lampblack. R. D. M. continued two 
meals longer, but had to reduce the quantity of cereal eaten, and 
was unable to take the last meal on the fourth day because of 
the decidedly uncomfortable conditions of the intestine, and 
also because the cereal had become very distasteful, so that the 
last meal was eaten only with difficulty. KE. O. managed to 
continue until supper of the fourth day, but at the beginning 
of the third day he had greatly reduced the quantity of cereal 
eaten. 
The experiments were carried on during the warm summer 
weather, and it may be that the condition of temperature was 
favorable to the presence and growth in the cereal of some of 
the organisms that cause fermentation in the alimentary tract. 
It is possible that the relatively large amounts of cream eaten 
in some instances might have had some influence in creating 
the intestinal disturbances, though it is believed that it had 
none, because all of the subjects were fond of cream, and at 
