6 



BULLETIN" 310, IT. S. DEPARTMENT OF AGRICULTURE. 



cooked lard was digested by mice and that raw lard was from 74 to 

 89 per cent digested by guinea pigs. 



To secure data regarding the thoroughness of digestion of lard by 

 normal individuals living under uniform conditions, nine tests were 

 made in this laboratory and six different subjects were used. The 

 experiments were performed in different seasons of the year, because 

 of the belief sometimes expressed that fats are better utilized in 

 colder than in warmer weather. The results are recorded in the 

 following tables: 



Data of digestion experiments with lard in a simple mixed diet. 





Weight. 



Water. 



Protein. 



Fat. 



Carbo- 

 hydrates. 



Ash. 



Experiment No. 38, subject J. C: 



Grams. 

 1,765.0 



186.5 

 1,471.5 



168.0 



Grams. 



1,086.6 



15.9 



1,278.7 



Grams. 

 39.9 

 25.0 

 11.8 



Grains. 



254.1 



2.1 



2.9 



Grams. 

 375.9 

 140.5 

 170.7 

 168.0 



Grams. 

 8.5 





3.0 



Fruit 



7.4 



















3,591.0 

 63.5 



2,381.2 



76.7 

 17.6 

 59.1 



259.1 

 11.2 



247.9 



855.1 

 26.3 

 828.8 



18.9 



Feces 



8.4 







10.5 

















77.1 



95.7 



96.9 



55.6 











Experiment No. 39, subject J. F.: 



1,740.5 



194.0 



1,698.7 



51.7 



1,070.3 



16.5 



1, 476. 2 



39.5 

 26.0 

 13.6 



250". 7 

 2.2 

 3.4 



371.4 

 146.2 

 197.0 

 51.7 



8.6 





3.1 



Fruit 



8.5 



















3,684.9 

 86.0 



2,563.0 



79.1 

 21.1 

 5S.0 



256.3 



13.1 



243.2 



766. 3 

 41.5 

 724.9 



20.2 



Feces 



10.3 







9.8 

















73.3 



94.9 



94.6 



48.5 











Experiment No. 44, subject J. C: 



1,752.5 



261.0 



1,029.5 



59.5 



947.6 

 22.2 

 894.6 



40.1 

 35.0 



8.2 



218.9 

 3.0 

 2.1 



532.9 

 196.6 

 119.4 

 59.5 



13.0 





4.2 



Fruit 



5.2 



















3,102.5 

 64.0 



1,864.4 



83.3 

 20.0 

 63.3 



224.0 



10.9 



213.1 



908.4 

 25.9 

 882.5 



22.4 



Feces 



7.2 







15.2 

















76.0 



95.1 



97.1 



67.9 











Experiment No. 47, subject R. L. S.: 



1,715.6 

 493.3 

 734.7 



70.7 



774.7 



41.9 



638.4 



40.8 



66.2 



5.9 



288.4 

 5.6 

 1.5 



597.1 



371.7 



85.2 



70.7 



14.6 





7.9 



Fruit 



3.7 



Sugar 

















3,014.3 

 81.0 



1,455.0 



112.9 

 25.0 

 87.9 



295.5 



13.8 



281.7 



1,124.7 



33.3 



1,091.4 



26.2 



Feces 



8.9 







17.3 











Per cent utilized 







77.8 



95.3 



97.0 



66.0 











Experiment No. 48, subject I. D. B.: 



Blanc mange containing lard 



Wheat biscuit 



1, 717. 9 



391.8 



1, 158. 6 



39.3 



777.2 



33.3 



1,006.8 



40.8 



52.5 



9.3 



288.8 

 4.5 

 2.3 



596.2 

 295.2 

 134.4 

 39.3 



14.9 

 6.3 



Fruit 



5.8 



Sugar 















Total food consumed 



3,307.6 

 117.8 



1,817.3 



102.6 

 36.9 

 65.7 



295.6 



24.6 



271.0 



1,065.1 



43.1 



1,022.0 



27.0 



Feces 



13 2 



Amount utilized 





13.8 











Per cent utilized 







64.0 



91.7 



96.0 



51.1 











