48 Miss J. E. Lane-Claypon. On the Origin, etc., of [June 16, 



Diameter just before 

 birth, at 28th or 

 29th day. 

 mm. 

 0-0288 

 0-0315 

 0-0270 

 0-0297 



0-0288 Average = 



0-0315 = 



0-0288 



0-0306 



0-0315 



0-0306 



0-0298 mm. 

 29-8/* 



Diameter a few hours 

 after parturition. 



0-0270 

 0-0279 

 0-0279 

 0-0270 

 0-0270 

 0-0261 

 0-0252 

 0-0279 

 0-0270 

 0-0279 



Average = 0-027 mm. 

 = 27/* 



0-2988 



Diameter after 

 3 days' lactation, 

 mm. 



0-0270 

 0-0252 

 0-0279 

 0-0270 



0-0270 Average = 



0-0252 = 



0-0279 



0-0261 



0-0270 



0-0279 



0-0268 mm. 

 26-8 fi 



0-2709 



Diameter after 

 6 weeks' lactation, 

 mm. 



0-0180 

 0-0171 

 0-0162 

 0-0180 

 0-0171 

 0-0153 

 0-0180 

 0-0171 

 0-0162 

 0-0180 



Average = 0-0171 mm. 

 = 17-1/* 



0-2682 0-1710 



I 



Tabulating these results, one gets — 



Approximate age of pregnancy. Diameter of cells in fi. 



(= normal) 17'0 



14th day 23-4 



18th „ 27-2 



20th „ 31-9 



22nd „ 32-6 



27th „ 31-8 



Shortly before birth 29-8 



after „ 27'0 



3 days „ „ 26-8 



6 weeks „ ,, 17"! 



