326 
VENTRODOR 
MEASUREMENT 
20 mm. 
mm. 
mm, 
7 mm. 
mm. 
mim. 
mm. 
mm. 
mm. 
mm. 
10 
mim. 
mm, 
mm, 
mm. 
mm. 
mm. 
mm. 
3 mm. 
2 mm, 
1 mm. 
Fia. 6. 
dorsal plane. 
; ; 
Jacob Parsons Schaeffer. 
SAL AGE AGE 
'pDAYS—INTRA UTERINE | £ MONTHS—EXTRAUTERINE 
te cafe 100 120 210 Term{|| § 2 20 
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Chart_showing the gradual] increase in size of the sinus maxillaris in its ventro- — 
