Digestibility. 



523 



In experiment No. 76 there was a much larger proportion of vegetable protein 

 owing to the shredded wheat and gluten crackers and hence the digestibility of 

 protein is very considerably less. The coefficient of digestibility in this 

 instance is only about 78 per cent. The corresponding coefficients for the fat, 

 carbohydrates, and energy are 88.7, 96.0, and 86.6. 



Table 245. Data regarding digestibility of food- 



Nos. 70, 74, and 76. 



-Metabolism experiments 



Labora- 

 tory 

 number. 



Kind of food. 



(a) (6) 



Weight Total . 



of mate- or g amc 

 !?i matter 



nal - \(d + e+f) 



(c) 



Nitro- 

 gen. 



(d) 

 Pro- 

 tein 

 (2VX 

 6.25). 1 



(e) 

 Fat. 



(/) 



Carbo- 

 hy- 

 drates. 



(9) 



Ash. 



(h) 

 Heat of 

 com- 

 bus- 

 tion. 



Experiment No.70. 



3806-8 Milk 



3773. . Plasmon 



3809. 



Grams. 

 4844.50 

 19.23 



Total. 



Feces 



Urine 



Ain't available. 

 Coefficients of di- 

 gestibility 



4863.73 

 182.90 



3826. 

 3827. 

 3828. 

 3829. 



3838-9 



3841. 

 3842. . 

 3844. 

 3845. 

 3843. 



3858. 



Grams. ' Grams. 



1003.23; 23.42 

 15.68 2.29 



1018.91 

 49.89 



25.71 

 1.08 



969.02 



Per ct. 



95.1 



24.63 

 Per ct. 

 95.8 



Grams. Grams. Grams. 



146.29 642. 231214.71 



14.33 .03 1.32 



160.62 642.26 

 6.79 43.10 



216.03 



Grams. 

 30.66 

 1.66 



32.32 



11.58 



153.83 599.16 



Per ct. , Per ct. 



95.8 93.3 



216.03 

 Perct. 

 100.0 



20.74 

 Perct. 

 64.2 



Cals. 



7637 

 93 



7730 

 448 

 276 



7006 

 Perct. 

 90.6 



Experiment No. 74- Grams. \ Grams 



Milk 3600.00 715.32 



368.10 50.31 

 938.70 110.37 

 105.00 97.92 



Apple 



Orange juice 



Graham crackers. 



Total. 

 Feces. . .. 

 Urine. . . . 



Am't available . . . 

 Coefficients of di- 

 gestibility 



5011.80 

 106.30 



973.92 

 25.68 



Experiment No. 76 



Milk 



Apple 



Shredded wheat 



Gluten crackers. . . . 

 Orange juice 



948.24 

 Per ct. 

 97.4 



Grams. 



17.28 

 .12 

 .75 

 .96 



19.11 

 1.27 



17.84 



Per ct. 

 93.3 



Grams. 



107.28 



.54 



4.59 



5.43 



117.84 

 7.92 



109.92 

 Per ct. 

 93.3 



Grams. Grams. 



433.08 174.96 

 49.77 

 105.78 

 81.66 



10.83 



443.91 



7.84 



436.07 

 Perct. 

 98.2 



Grams. 



23.76 



.81 



3.48 



1.71 



Cals. 



5322 

 198 

 411 

 468 



412.17 

 9.92 



29.76 

 5.95 



6399 

 196 

 217 



402.25 

 Per ct. 

 97.6 



23.81 5986 

 Per ct. Per ct. 

 80.0 93.6 



Grams. 

 1952.10 

 368.10 

 533.40 

 30.30 

 938.70 



Total. 



Feces 



Urine 



3822.60 

 332.80 



Am't available. . . 

 Coefficients of di- 

 gestibility 



Grams. 

 365.04 



47.97 

 485.28 



28.62 

 114.45 



1041.36 

 79.34 



962.02 



Perct. 



92.4 



Grams. 

 3.33 

 1.29 

 9.48 

 4.32 

 .93 



Grams. 

 20.81 



8.06 

 59.25 

 27.00 



5.81 



19.35 

 4.26 



15.09 

 Per ct. 



78.0 



120.93 

 26.63 



994.30 

 Per ct. 



78.0 



Grams Grams. Grams. \ Cals. 



202.83 141.40, 4.50 2529 



.... 39.91' 1.05 195 



9.33 416.70 9.60 2184 



.09 1.53! .72 165 



.... 1108.64 3.84 450 



212.25 708.18 

 24.03 28.68 



19.71 

 12.51 



5523 

 478 

 260 



188.22 679.50 



Per ct. 



88.7 



Per ct. 

 96.0 



7.20 4785 



Per ct. Per ct. 



36.5 86.6 



1 With some food materials other factors are used. 

 1 Ash by difference. See p. 521. 



