COMPOSITION OF HUMAN MILK IN AUSTRALIA. 



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0*05%. The total quantity of these substances is small, 

 so that comparatively large variations in their amount 

 would not materially alter the total amount of these 

 remaining constituents of human milk, and so a reliable 

 estimate of the amount of sugar present may be arrived at 

 by simply deducting 0*5 from the percentage of substances 

 obtained by subtracting the percentages of fat and of protein 

 from the percentage of total solids. In the table of results 

 the percentages of these solids not fat and not protein are 

 given, and from them the percentages of sugar may be 

 calculated by making the above deduction. 



The percentages of solids not fat have also been given in 

 the table of results, as this portion of the milk has been 

 observed to be more constant in amount than the other con- 

 stituents, and importance has therefore been attached to 

 it for purposes of comparison. 



3. Results. 

 The results of the analyses made, and the particulars of 

 the samples of milk used are given in the following table. 

 The figures given in the several columns represent: (1) the 

 number of the sample ; (2) the breast from which the 

 sample was taken, R = right breast, L = left breast, B = 

 both breasts; (3) the age of the mother in years; (4) the 

 number of the pregnancy; (5) the age of the child in days; 

 (6) the time in hours since the last application of the child 

 to the breast; (7) the volume of the sample in cc; (8) the 

 density of the sample; (9) the percentage of total solids; 

 (10) the percentage of fat; (11) the percentage of solids 

 not fat; (12) the percentage of protein; (13) the percentage 

 of solids not fat and not protein. The results given in the 

 table have been arranged in descending order of the number 

 of pregnancies of the mother, the results for any given 

 number of pregnancies being in descending order of the age 

 of the mother and of the time since the child was last 

 suckled. 



