GROWTH AFTER INANITION FOR VARIOUS PERIODS. 25 



reach the same ultimate body weight as the controls, but in a 

 much shorter period of actual growth. The results therefore 

 agree with those previously stated for the rats subjected to 

 repeated short periods of alternate fasting and refeeding. 



This phenomenon of rapid growth following periods of sup- 

 pression has been observed in various animals by Schapiro ('05) 

 (cat), Hatai ('07) (rat), Miss Springer ('09) (salamander), 



220 

 200 

 180 



| 160 



Z 



O 140 



tH 



120 



.S? 

 '53 



"8 80 

 M 



60 



40 



20 40 60 80 ioo 120 140 160 180 200 220 240 260 280 300 320 340 



Age in Days 



CHART B. Females. Chart showing the average absolute increase in weight of 

 the control female rats from the age of three weeks, and also of the test females 

 refed after various periods of maintenance. The curves are drawn through points 

 representing the averages of the individual weights of the rats of litters S8, 89, and 

 814, at the various periods. Body weight in grams is represented on the ordinate 



and age in days on the abscissa. Controls. Rats refed after one 



week of maintenance. Rats refed after three weeks of maintenance. 



- Rats refed after seven weeks of maintenance. 



Morgulis ('ii) (salamander), Schloss ('n) and Boas ('12) 

 (human), Miss Ferry ('13) (rat), Osborne and Mendel ('15 and 

 '16) (rat), and others. Osborne and Mendel find that after 

 periods of suppression by various methods the growth upon re- 

 feeding appears even more rapid than King's ('15) normal for 

 younger rats of the same size. Although no direct controls were 

 observed their results are very striking. 



If we accept Minot's ('08) theory that the relative abundance 



