EXPERIMENT STATION BULLETINS. 



189 



from the droppings. The anal.yses were made by Mr. A. J. Patten, Ex- 

 periment Station Chemist. The percentage composition in every case, 

 in the following tables, is reported on a water-free basis. This is neces- 

 t^ary to give fair comparisons, as the samples from the manure could not 

 be dried back to their exact original moisture content. 



The tables give the percentage composition water-free basis of all 

 three grain rations, both before and after feeding to cows, heifers and 

 calves. 



Table Showing Composition of Corn. 



Table Showing Composition of Oats. 



Table Showing Composition of Corn and Oats. 



The above tables are the averages taken from analyses of samples for 

 each animal. The differences in composition of the original grain, as 

 compared with the samples from the droppings, are slight in every case. 

 The increase in percentage of some of the constituents is due to the re- 

 moval of a larger proportion of the others. In each case the greatest 

 amount of ash was taken out by the cows, and the least by the calves, 

 but with the Nitrogen-free extract the reverse is true — the calves taking 

 out more than the cows. The changes in protein, fat, and crude fibre 

 show no regularity, and are too small to be of importance. From these 



