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IOWA ACADEMY OF SCIENCE Vol. XXV, 1918 



the two remainino; conipartraents of the stomach appeared to be 

 normal. The contents of the rumen resembled thin cottage 

 cheese mixed with hair. 



The bones of Calf No. 366 appeared to be in fairly good con- 

 dition though one or two of the ribs might previously have been 

 broken and healed. The mesenteric lymph glands were enlarged 

 and both kidneys were in bad condition with cysts. All the 

 stomach compartments were of about normal size Imt there were 

 streaks of dark brown or black pigment on the inner wall of the 

 abomasum. The contents of the rumen were similar to those in 

 the case of Calf No. 355. 



DISCUSSION OF RESULTS. 



A diet of whole milk alone though apparently giving good 

 results until the animals are aibout three months old ver}^ proib- 

 ably can not be relied on as the sole ration for calves of greater 

 age. Its inability to properly nourish older calves is not due 

 to any defect in the quantity or quality of the nutrients it 

 supplies. Cattle and other ruminants begin to consume rough- 

 ages at an early age and the lack of roughage may consequently 

 give an explanation of the results obtained in this work. 



In Table VI are given the lood requirements of the experi- 

 mental calves according to the modified Wolft'-Lehmann feeding 

 standard and the amounts of nutrients with which they were 

 actually supplied. 



TABLE VI. 

 NUTRIENTS REQUIRED BY AND SUPPLIED TO CALVES. 



111 111 is tal)le the animals have been taken to,zether rather than 

 individually and the milk consumption is taken for all 30-day 

 periods which were completed. It was presumed that the daily 



