PLATE 31 



A-B. — Cow 642 and her calf, showing the effect of a ration of com grain, wheat 

 straw, and alfalfa hay. Without the alfalfa hay disaster in reproduction would have 

 resulted. The calf was normal and vigorous. 



C-D. — Cow 643 and her calf, showing the effect of a ration of com grain, wheat 

 straw, and alfafa hay. Without, the alfalfa hay disaster in reproduction would have 

 resulted. The calf was normal and vigorous. 



E-F. — The calf of cow 636, showing the effect of a ration of wheat grain, wheat straw, 

 and alfalfa hay. The introduction of half of the roughage as alfalfa hay made the 

 ration a success ; at least for a single gestation period . The probable factors introduced 

 were better ash, different proteins, and more of the growth -promoting substances 

 fat-soluble A and water-soluble B. These factors enabled the animal to resist the 

 effects of toxicity. The calf was strong. 



