i8,6' Nanagas: Position and Size of Kidneys 701 
Left kidney. Right kidney. 
Ages. 
30 40 <50 60 JO 80 90 30 40 50 60 70 80 SO 
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Fig. 2. Dimensions of the kidneys of females in relation to age. 
From the above we find that in general the left kidney is 
larger than the right, exceeding it by 0.37 centimeter in length, 
0.03 centimeter in width, and 0.19 centimeter in thickness. 
Piersol(3) bears out my findings with reference to the larger 
size of the left kidney. 
The female kidneys were decidedly larger than those of the 
males, taken in general or by corresponding sides. 
In relation to different ages, I found a gradual increase in 
size, which in males attained its maximum at the age of 30 to 
40 years, a gradual decline being noted with advancing age. 
