THE RATE OF GROWTH 117 



life. Taking the observations recorded by Bouchaud, 1 

 the following table has been calculated by Muhlmann 

 (I.e., p. 112). It is only necessary to look at the 

 diminishing values in the third column to recognise 

 the swift decline in the rate of growth. 



TABLE IV 



Monthly 



Age in Weight Percentage 



Months. in Grammes. Increment. 



3250 



1 4000 23.0 



2 4700 17-5 



3 5350 14-0 



4 5950 II.O 



5 6500 9.2 



6 7000 7.7 



7 7450 6.4 



8 7850 5-3 



9 8200 4.4 



10 8500 3.6 



11 8750 3.0 



12 9000 2.8 



This completes the series of curves which I had 

 prepared to present to you to show the rate of growth 

 in animals from their birth only, but of course there 

 has been also a growth of the animals which preceded 

 their birth, and that now must briefly be considered. 



The mere inspection of developing embryos of 

 known ages gives us some idea of the rate of growth. 

 With the aid of the lantern I will ask you to look with 

 me at some pictures of the developing chick and de- 

 veloping rabbit. Let us begin with the chick (Fig. 42). 2 



1 Bouchaud, De la mart par inanition et e"tude experimental sur la nutrition 

 chez le nouveau-ne*, 1864. 



s During the lectures a series of lantern slides were projected upon the 

 screen, made from photographs of mounted specimens of chicken embryos, 



