\ 
426 HALBERT L. DUNN 
at the beginning of the third month, and this rises at first slowly 
and then rapidly to about 150 cc. at birth. 
aa 0 i) aes ies 05.40.40. 450. SO nee 
Fig.5 Field graph and curve of the growth in weight and volume of the left 
cerebral hemisphere in fetal life. Abscissa: total body length in cm. Ordi- 
nate: left hemisphere weight and volume in grams (cc.). Individual cases 
indicated by solid dots (for weight) and by circles (for volume). Curvedrawn 
to the formula: Y = (0.105X)* 4. (Data from tables 9 and 10.) 
The percentage increment of the hemispheres (fig. 26, curve VI) 
approximates that of the entire brain. It is about 265 per cent 
for the interval between 10 and 15 cm. (C H) length and steadily 
declines from this value until it reaches the level of 35 per cent 
for the 50-to-55-em. (C H) interval (birth). 
