THE DIGESTIBILITY OF THE DASHEEN, 5 
meal of the experimental period and with the first meal succeeding 
the test period; the resulting dark coloration of a portion of the 
feces makes it possible, generally, to separate very accurately the 
feces from the experimental diet from the remainder voided at the 
same time. The feces for each experiment were deposited in tared 
glass containers and were dried in an electric oven regulated to main- 
tain a temperature of 95° C. When dry, the total amount of feces for 
each subject was finely ground and thoroughly mixed for analysis. 
Samples of both food and feces, the latter reported on “ water-free ” 
basis, were analyzed to determine the percentages of protein, fat, and 
carbohydrates, according to the methods outlined by the Association 
of Official Agricultural Chemists,t and from a comparison of the re- 
sults it was determined how much was actually digested. 
The data essential for the interpretation of the results of the 
digestion experiments are given in the tables below, and include 
the total amount of food eaten, the amounts of protein, fat, and 
carbohydrates supplied, the weights of the feces and their constit- 
uents, and the coefficients of digestibility of the protein, fat, and car- 
bohydrates of the diet. 
EXPERIMENTS WITH IMMATURE DASHEENS. 
Six experiments were made with immature dasheens and, while 
these were not all carried on at the same time, the subjects and all 
experimental conditions were the same throughout. The results are 
given in the following table: 
Data of digestion experiments with immature dasheens in a simple mixed diet. 
Pre Carbo- 
Food. Total. | Water. fem Fat. hy- Ash. 
: drates 
Experiment No. 513, subject A. J. H.: Grams. | Grams. | Grams.| Grams.| Grams.| Grams. 
MASH COnesrr ear ee Sau ole tete sess aced 1, 430.0 983.1 24.2 2.3 | 406.4 14.0 
FG e ete ener ae Se See eee) eee ek) 2,530.0 | 2,201.1 75.9 101.2} 126.5 25.3 
LINDT SSS oa a eae 134.0 113.8 1.0 0.3 15.2 0.7 
T BNEW PD) By Sin See ee Ee et eee 482.0 53.0 | 4.8 (Wr 4092 (e126 3-2 14.5 
Rotalitaod: CONSUME! 225 6.5L obo see sas 4 4,573.0 | 3.351.0 | 105.9 | 513.5 | 548.1 54.5 
HE CESHetepeetere see eye cats Sas ce aes cc jemakees. OSi Onl eseesss- 33.4 30.6 17.7 16.3 
EASEIROTER GREET ERE REU ote ee Sai te los oe te a aslo Sela Nees eee be Ses 482.9 | 530.4 38.2 
Prarie art Acer h St eee a ea ey igen Sates. | 68.5} 94.0] 96.8] 70.1 
Experiment No. 514, subject P. K.: | 
IDO NOG: Lee ee a Se ene ieee See 1,599.0 | 1,099.3 27.0 2.6 | 454.4 GET 
CTS wien Beet 5 eee ee a ea a 2) 363.0 | 2,055.8 | 70.9| 94.5| 118.2] 923.6 
DoT) h ceo de eae Sean ee es a 741.0| 643.9] 5.9] 1.5| 86.0 B57 
PSF eke eee ea SAQEOF| ut S764 ee | ongROn eee 10.2 
Retalseed GOnSUMed. 925222565) 2- 5.25655 5,043.0 | 3,836.4 | 107.2 | 387.6] 658.6 53.2 
LINES DS So eee SE aah ay 34. OFose oa 10.0 8.2 10.6 5.2 
JsATEUV IVE SM FUGUE 726 Cay A a Sa ee [eee |Sseesaacs 97.2 | 379.4 | 648.0 48.0 
ap con auinecela ere eic: <2 Siete aca 2es li. odbc ocak [eee ae | 90.7] 97.9| 98.4] 90.2 
—— | ——— SS See eS SSS 
1U. S. Dept. Agr., Bur. Chem. Bul. 107 (1912), rev. ed. 
