456 



Prof. E. A. Schafer. 



[July 22, 



The experiment is here set out in tabular form and some of the results 

 are given in the form of charts (figs. 2 and 3). In the table the total weight 

 of the animals in each group, the total amount of urine collected in the 

 given time, its reaction and specific gravity, and the percentage of urea are 

 shown. 



The chart (fig. 2) shows the relative rate of increment of weight of 

 Groups A and B, the dates being marked upon the abscissa at proportionate 



Dabes4 8 12 16 20 24 28 1 4 8 15 22 29 6 13 20 27 

 March April May 



Fig. 2. — Chart showing Eate of Growth of two groups of Eats from same litter. Group A 

 with addition of anterior lobe of pituitary to food ; Group B, controls. The addition 

 was commenced on March 8. 



intervals, whilst the weights in grammes are given as ordinates. The 

 drop in weight from May 6 to May 13 was due to the fact that the 

 feeding of the animals during part of that time was restricted to only 

 two hours a day. This chart shows that whereas before the pituitary 

 feeding began there was a tendency for the rats belonging to Group A 

 to increase in weight less rapidly than those of Group B, after eight 

 days of the addition of pituitary to the food of A these show a steady 

 increase on Group B, the increase being continued up to the end of the 

 experiment. 



The chart (fig. 3) shows the relative amount of urine per diem in the two 

 groups, calculated per kilogramme weight of animal. The ordinates 



