DIGESTIBILITY OF RAW STARCHES AND CARBOHYDRATES. 5 
The coefficient of digestibility of the raw cornstarch, corrected — 
for the undigested residue from the accessory foods, was found in 
each case to be 100 per cent. This was confirmed by the micro- 
scopic examination of the feces which showed no starch present. The 
average coefficients of digestibility for the protein and the fat of the 
entire ration were found to be 87 per cent and 95 per cent, respec- 
tively. The subjects were in normal health during these experiments 
and found that the diet quite satisfied the appetite. 
EXPERIMENTS WITH RAW WHEAT STARCH. 
Three experiments were made with raw wheat starch. The diet 
furnished the following average amounts of nutrients and energy per 
woman per day: Protein, 21 grams; fat, 64 grams; carbohydrate, 291 
grams; energy, 1,825 calories. The average amount of raw wheat 
starch eaten per woman per day was 168 grams. 
The coefficient of digestibility of the raw wheat starch, corrected 
for accessory food residue, was 100 per cent, and the completeness of 
digestion of the raw starch was confirmed by the microscopical 
examination of the feces which showed no starch present. The 
average coefficient of digestibility of the protein of the entire ration 
was 79 per cent and that of the fat 94 per cent. A sample of urine 
from one subject obtained during this diet was found free from sugar 
or albumin. 
TaBLE 2.—Digestion experiments with raw wheat starch in a simple mized diet. 
| Constituents of foods. 
Experiment, subject, and diet. weiehs — | 
* arbo- | e 
Water. | Protein. hydrate. | Ash 
Experiment No. 1175, subject A. T. M.: | 
Frezen pudding (raw wheat starch, 
-0 grams or 65.22 per cent of total | Grams. | Grams. | Grams. | Grams. | Grams. | Grams. 
Gar BOWGOTALC) =. 828 27 52h so as: 2,725.0} 1,690.0 55.6 190.8 : 15.8 
Lgilb bas io oe oe eel ap Se ee 881.0 765.6 7.0 1.8 4.4 
LES... --22f Ls ae ed ee le 2h ge Ets a ene peeeee ene eine nnEn segue” os Te 
Total food consumed................ 2,455.6 62.6 192.6 20.2 
eS este b et ascacp apn 48-0 |. cdaviewac~ 13.4 14.9 ; 9.4 
Pee IEETE ME oot oe emacs ccelac anedescs)> acmame cae 49.2 177.7 864.7 10.8 
Per cent. | Per cent. | Per cent.| Per cent. 
DOS oa ese i a ae 78.6 92.3 98.8 53.5 
Estimated digestibility of raw wheat 
SPY GL PUTO S . yp ERE RAS ES eee be meee bi ee eee Pees eee TOGO.) 5 22 Se 
Experiment No. 1176, subject C. M.: 
Frozen pudding (raw wheat starch, 
499.8 grams or 65.22 per cent of total Grams. | Grams. Grams. 
eaxiohiysiedie)2.. 2225S: -. .-.0et J. 55-1 189.1 15.7 
iy LE Ree ie se Ee Ea: og Se ee 6.7 T27 4.2 
JOT 1 eel 2 <a eee SE sec: oe 37 aS 2 es ee eee Rind ey Soe 
Total food consumed................ 61.8 190.8 862.8 19.9 
CRS ee eae in ads te odd acco ce 13.0 11.1 11.2 5.7 
TUT 9. 079 ee ee ie a ee eee 48.8 179.7 851.6 14.2 
; Re Per cent. | Per cent. | Per cent. | Per cent. 
Digestabwity of entireration.iess folk J.]... 02.25.) cece cece 79.0 94.2 98.7 | 71.4 
Estimated digestibility of raw wheat 
Co eS Se Eee ec ao a fo ee Jo's ROGUB ALG eS 
