VOLUMES, CORTEX AND MEDULLA, ADRENAL GLAND 297 
that when specimens are embedded in paraffin directly from 
cedar oil they may show a loss of as much as 41 per cent of their 
fresh volume. 
VOLUME 
CUBIC M.M. 
BODY WEIGHT 
GRAMS 
50 100 150 200 250 300 
Chart 4 The growth of the whole gland expressed in cubic millimeters. The 
upper line gives the values for the females, the lower line that for the males. 
Dots, *, males, individual values. Crosses, +, females, individual values. 
To sum up: The left adrenal in the albino rat is usually dis- 
tinctly heavier than the right. The relative volume occupied 
by the medullary tissue decreases rapidly from birth to puberty, 
50 to 100 grams, and then remains stationary or increases a little 
