152 



MILK AND ITS HYGIENIC RELATIONS 

 Weeks 



Grammes 12345678 9 10 II 12 13 14 15 16 17 18 192021 22222425262728 

 10000. 



9000 



$000 



7000 



6000 



5000 



4000 



3000 



2000 



(After Czerny-Keller) 



DIAGRAM 3. The numerals I and II placed against the curves correspond 

 respectively to those below. These latter show the grammes of milk 

 taken each day by each of the two children. 



