436 HALBERT L. DUNN 
The cerebellum is not grossly visible before the fetus is about 
10 em. (C H) long. At 20 cm. (C H) its volume is about 0.4 ec., 
and this increases slowly to about 2 cc. at 30 em. (C H). The 
% 5 10 15 £0 5 50 35 40 45 50 55cm 
Fig. 11 Field graph and curve (connecting the average points of each 5-cm. 
crown-heel interval) of the per cent which the volume of the cerebellum forms of 
the encephalon volume. Abscissa: total body length in cm. Ordinate: cere- 
bellum volume in per cent of entire brain volume. Individual cases indicated 
by solid dots. (Data from table 40.) 
absolute volume curve then turns sharply upward and rises very 
rapidly to 21 cc. at 50 cm. (C H). 
On the basis of time (figs. 34 and 35), the volume of the cere- 
bellum is about 0.4 ec. at four fetal months and approximately 
