450 DISEASES OF CATTLE. 



We place these amounts at the head of our table at A : 



TAHM-: III. Showing lion- <o construct a ration for a dairy 



In order to properly distend the rumen the feed should have a cer- 

 tain bulk, and will amount on the average to about 24 pounds of organic 

 matter, which sum is placed in the first column. This portion of 

 the table can vary more than any other without serious detriment. 

 Having the requirements before us in the table, let us approxi- 

 mate it by combining seA'cral food materials from our list. For 

 trial we will take 14 pounds of corn fodder. By adding the water 

 given in Table I to the ash and subtracting from 100, we have the 

 total organic matter in 100 pounds of fodder corn. For 14 pounds of 

 fodder corn the amount of organic matter is 7.71, wliich we place under 

 the column headed " Organic matter." By Table 1, again, we learn 

 that the digestible crude protein of field cured fodder corn is 2.8 per 

 100 pounds; for 14 pounds it is 0.39. The digestible' carbohydrates in 

 the fodder corn is 29.5 for 100 pounds, and for 14 pounds 4.13. The 

 ether extract in 100 pounds of fodder corn is 1 pound, and in 14 pounds 

 is 0.14. We place these sums in their respective columns, which gives 

 the total organic matter and digestible material for 14 pounds of fodder 

 corn. In the same manner we find the organic matter and digestible 

 nutrients in 6 pounds of clover hay, then in 5 pounds of bran, and, 

 finally, 5 pounds of ground corn, all of which is summarized under B of 

 the table. We next add the several columns to ascertain the total con- 

 stituents. The sums are found under the first trial ration. We now 

 compare this trial ration, which is the sum of the items under B, with 

 the required ration at A. We notice the organic matter is a little more 

 than 3 pounds short of the requirements, and there is still about three- 

 fourths of a pound of protein and a pound of carbohydrates lacking, 

 while the ether extract is already 0.2 of a pound in excess. Our ration 

 is short of the requirements, and to bring B still nearer A we add to 

 the trial ration as given 2 pounds of cotton-seed meal, choosing this 

 feed because we must add some substance rich in protein. Determin- 

 ing the nutrients in 2 pounds of cotton-seed meal we place them at 6 r , 

 and adding the items to the first trial ration, or B, we get the second 



