PHYSIOLOGY AND EXPERIMENTAL PATHOLOGY 727 



anterior lobe and the other 4 used as controls were fed the same amount 

 of dried meat. These animals were fed for ninety days. 



The third series consisted of nine rats which were divided into three 

 groups. One group was fed daily 3 gm. of beef ; another the same amount 

 of posterior lobe and the remaining group was fed dried thymus. 



It is interesting to note that animals consuming the same amount of 

 food daily and apparently enjoying equally good health should vary so 

 much in weight gaining. The minimum gain in weight of the controls in 

 Series I was 30.6 gm., the maximum 44.4 gm. In Series II the minimum 

 gain in weight of the control rats was 32 gm., the maximum 38.5 gm. In 

 Series III the rats were but two-thirds grown and not so well suited to 

 the experiment. One of the controls and one fed on the posterior lobe 

 lost 5 gm. 



FEEDING EXPERIMENTS LEWIS AND MILLER 



It will be seen by the table that in the first series the controls and the 

 rats fed on the anterior lobe gained practically the same amount, while the 

 animals fed on the posterior lobe gained on an average 6 gm. each, more 

 than the controls. Individually one of those fed on the posterior lobe 

 gained less than one of the controls; the other two gained more than the 

 controls and each animal fed on the posterior lobe gained more than those 

 fed on the anterior lobe. In series III the animals receiving the posterior 

 lobe gained less than the controls and much less than those animals being 

 fed the thymus. In series I animals receiving the anterior lobe gained 

 slightly less than the controls, while in series II they gained somewhat 

 more than the controls. 



