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



(b) Section Area of the Grey Substance. (G.) 



Table II. — Section Area of the Grey Substance and of the Central 

 Canal (Charts I, II, V, XIII). 



Region of cord. 



Distance 



in cm. 

 trom tne 

 uppermost 

 section of 

 I Lumbar 

 region. 



Grey substance. 



Mean. 



Central canal. 



Planimeter 

 measure- j 

 ment in ' 

 sq. cm. 



Actual 

 area as 

 calculated 

 in sq. mm. 



r*l Q VII YY1 of OV 

 X Idi ill 111 C LCT 



111 BU, 1. ILL. 



Actual 

 area as 

 calculated 

 in sq. mm. 



Dorsal (thoracic)- 















VI 





— 



4-98 



1-245 



— 



0-02 



-0050 



XII 





— 



7-56 



1 -890 



— 



0-04 



-oioo 



Lumbar — 















tJ 



Upper 



0-142 



10 -22 



2-555 "I 







0-08 



-0200 





Mirlrllp 



lyLiacue . . . 



0-268 



9-94 



2 -485 





2-607 



0-06 



-0150 



1 



Lower . . . 



0-608 



11 -12 



2-780 J 







0-06 



-0150 



( 



Upper . . . 



0-846 



13 -58 



3-395 1 







0-03 



-0075 



H 



Middle ... 



1 -058 



14 -20 



3-550 





3-553 



0-04 



-oioo 





Lower . . . 



1-302 



14 -86 



3-715 J 







0-11 



-0275 





Upper . . . 



1-558 



16 -64 



4-160 ] 







0-14 



-0350 



H 



Middle ... 



1 -681 



16 -90 



4 -225 





4-240 



0-08 



-0200 





Lower . . . 



1 -918 



17 -34 



4-335 







0-08 



-0200 





Upper . . . 



2 -064 



23 -42 



5-855 1 







0-08 



-0200 



H 



Middle ... 



2 -244 



27 -86 



6-965 





6-651 



0-08 



-0200 





Lower . . . 



2 -484 



28 -53 



7-133 







0-16 



-0400 





' Upper . . . 



2-608 



28 -60 



7-150 1 







0-14 



-0350 



vJ 



Middle ... 



2-794 



29 -74 



7 -435 



y 



7-410 



0-18 



-0450 





Lower . . . 



2 -944 



30 -58 



7-645 







0-18 



-0450 





" Upper . . . 



3 -154 



27 -90 



6-975 ' 







0-12 



0-0300 



T , 



Middle ... 



3 -205 



25 -49 



6-373 



> 



6-234 



0-12 



-0200 





_ Lower . . . 



3 -328 



21 -42 



5 -355 







0-14 



0350 





" Upper . . . 



3 -450 



20 -84 



5-210 " 







-08 



-0200 



VII < 



Middle ... 



3 -557 



19 -45 



4-863 



>■ 



4-809 



-09 



-0225 





_ Lower . . . 



3 -642 



17 -42 



4-355 J 





-12 



-0300 



Sacral 



















"Upper ... 



3-782 



15 -28 



3-820 " 







0-08 



-0200 



H 



Middle ... 



3 -906 



14 -74 



3-685 



f 



3-573 



-04 



o -oioo 





Lower . . . 



4-057 



12 -86 



3 -215 







0-04 



o -oioo 





"Upper ... 



4-197 



12 -14 . 



3-035 " 







0-03 



-0075 



ii ■< 



Middle ... 



4-316 



10 -74 



2-685 



■ 



2-697 



0-03 



-0075 





Lower . . . 





9-48 



2-370 







0-03 



-0075 





"Upper ... 



4-623 



8-90 



2-225 " 







0-04 



o -oioo 



m< 



Middle ... 



4-723 



8 -34 



2-085 



\ 



2 -050 



0-02 



-0050 





[ Lower . . . 



4-858 



7-36 



1 -840 







0-04 



o -oioo 





[Upper ... 



4-974 



6-98 



1-745 " 







0-03 



0-0075 



IV- 



Middle ... 



5 -138 



6-66 



1 -665 



\ 



1-642 



0-03 



0-0075 





I Lower ... 



5 -312 



6-06 



1 -515 







0-03 



-0075 



Coccygeal— 

















f" Upper . . . 



5-486 



5-66 



1-415 







0-03 



-0075 



I 



1 Middle ... 



5 -622 



5-06 



1-265 



\ 



1-267 



0-03 



-0075 





[Lower .. 



5-726 



4-48 



1-120 







0-03 



-0075 





f Upper . . 



5-847 



12 -34 



-7712 







0-08 



-0050 



II 



1 Middle .. 



5 -939 



11 -55 



-7218 



} 



-6797 



0-08 



0-0050 





[Lower .. 



6-058 



8-74 



-5462 







0-10 



-0062 





["Upper .. 



6-174 



1-70 



-4250 







0-03 



"0075 



III 



<^ Middle .. 



6 -278 



4-92 



-3075 



} 



-3266 



0-07 



-0043 





1 Lower . . 



6-331 



0-99 



-2475 







0-02 



-0050 



