450 



Journal of Agricultural Research 



Vol. IV, No. s 



Table XLH. — Results of digestion trial 5, cow li, on a ration of grain, hay, and 



heavy prickly-pear 



PLATE F 



Opuntia cyanella, one of the principal species of prickly-pear used in these 



experiments. 



Fig. I 

 Fig. 2 

 Fig- 3 

 Fig. 4 

 Fig- 5 



-Mature joint; J4 natural size on a photographic background. 



-A flower bud; natural size. 



-Voting joint showing rudimentary leaves. 



-Flower; j 2 natural size. 



-A fruit; natural size. 



