110 Miss M. P. FitzGerald. The Lumbosacral-coccygeal [June 17, 



(b) White Substance. {Chart VI, Tables III and VI.) 

 i n h tv v vr w i n arwi k i 



13 

 12 

 11 

 10 

 9 

 8 

 7 

 6 

 6 

 4 



.Dim 



n. 





































































[ 























w ^ 









\ 































\ 































































V 





























L 



A 

































\ 













no , 



































































































































































90% 



eo 



70 

 60 



so 



40 

 30 



3a 



I n nr 



XV 



i n m 



IV 



I n in 



Chart VI. — Curves showing the Mean Sectional Area (W, thin continuous line) and 

 Percentage Value (w, thick continuous line) of the White Substance in the Cross- 

 section of the Cord (Tables III, VI). 

 The abscissae denote spinal nerve regions, the value of the ordinates given on the left- 

 hand side of the chart is for section area in square millimetres. For the percentage, the 

 value of the ordinates is given on the right-hand side. 



(c) Dorsal Columns. {Chart VII, Tables IV and VII) 

 i e m rr "v "ve tot i imTsri k m 



□ mr 



a. 





























































p 



. — * 



— - 





































k 



S 



\ 



V 















































p 



































50% 

 40 

 30 

 20 



III 



Lumbar 



I H TK 



Sacred, 



rv 



I H TK 



CoccyqeaZ 



Chart VII. — Curves showing the Mean Sectional Area (P, dotted line), and the Mean 

 Percentage Value (p\ continuous line) of the Dorsal Columns in the Cross-section of 

 the Cord (Tables IV, VII). 

 The value of the ordinates given on the left-hand side of the chart indicates the section 

 area in square millimetres, and on the right-hand side the percentage value. The 

 abscissae denote the spinal nerve regions. 



