642 



Journal of Agricultural Research 



Vol. XIII, No. ij 



feeds used were already finely divided and required no comminution. 

 All the rations and tests give information on the time food remains in 

 each organ. 



Table III. — Physical changes that occur during the digestion of coarse feeds in the 

 stomach and intestines of cattle 



RUMEN AND RETICULUM 



Steer No. 



Gross 

 weight of 

 contents. 



Percent- 

 age organ 



content 

 is of body 



content. 



Weight of dry matter 

 in contents of organs. 



Above 

 2 mm. 



Below 



Percentage of dry 



matter in contents of 



organs. 



Above 

 2 mm. 



Below 

 2 mm. 



Percent- 

 age dry- 

 matter 

 content of 

 organs 

 is of 

 total dry- 

 matter 

 contents. 



Percent- 

 age dry- 

 matter 



content is 

 of organ 



contents. 



52 

 49 

 46 



45 

 44 

 53 



52 

 49 

 46 



45 

 44 

 53 



52 

 49 

 46 



45 

 44 

 53 



52 

 49 

 46 



45 

 44 

 53 



52 

 49 

 46 



45 

 44 

 53 



Kgm. 

 49. 124 



51-150 

 46- 255 

 47. 000 

 41. 799 

 24. 454 



73-31 

 72-31 

 71.48 

 71.80 

 69. 16 

 66.85 



Kgm. 



1-754 

 2.471 

 2.369 

 3.000 

 . 000 

 . 000 



Kgm. 

 2.748 



2.431 

 3-153 

 2.265 

 2. 171 

 1.326 



61. I 



49-5 



57-1 



43- I 



100. o 



100. o 



69.4 



67-5 

 66. I 

 62. 9 

 59-2 

 58-5 



9.2 



9-7 

 II. 9 

 II. 2 



5-2 



r-4 



31- 1 



36. o 



23-7 



21. 7 



ABOMASUM 



SMALL INTESTINE 



10. I 

 13. 6 



5-0 



11. 2 

 . o 

 . o 



LARGE INTESTINE 



16. 7 

 18.6 

 26. o 

 18. 2 

 . o 

 . o 



3-2 

 6.8 

 4.8 

 5-6 

 6.9 



13.6 



13-8 



21. 7 



17.9 



8.2 



7-7 



6.2 

 8.1 



9-9 

 15.8 



6-5 

 6-3 



8.6 



9-4 



14.4 



15.0 



8-5 



7-7 



