no 



AGE, GROWTH, AND DEATH 



fluctuation, an increase, and then the decline goes on 

 again, and slowly we see the growth power fading 

 out. 1 Authors are not agreed as to the exact statis- 



YEARS I Z 3 4 5 6 7 8 9 10 II 12 13 14 IS 16 17 18 19 20 21 32 23 



tical value, and so I will ask to have thrown upon the 

 screen another curve (Fig. 38), also representing the 

 percentage increase of boys, and based chiefly upon 



1 The curves credited to Muhlmann are taken from his very excellent memoir, 

 Ueber die Ursache des Alters, 8vo, Wiesbaden (Bergmann), iqoo ; see specially 

 p. 114. His tables are particularly available in this connection because he has 

 adopted my method of calculating the rate of growth, but he does not present 

 his results in graphic form. 



