Ingbert, Ventral Roots of Spinal Nerves. 



213 



ing's case were relatively large in their cross-sections. 



Corresponding with Table I^ in the earlier paper (Ingbert, 

 June, 1903. p. 58), there is here given a table showing the 

 areas of the ventral roots as determined by the investigators 

 above named. (Table I, p. 212.) 



100 

 80 

 60 

 40 

 20 



100 

 80 

 60 

 40 

 20 



100 

 80 

 60 

 40 

 20 



Firt.I. Ab?olule area.* of vonlrol rools 



A. Kolliker. 



B. IiKiberl. 



C- Slillin.^. 



Fic^.n. Areas ofvenlral rools 



Areo of lor^esf roof - 100% 



A. Kolliker. 



B.- -Indberl. 



C. Slillin^ 



Flo.ni. A. Areas of venlral rools 



/ \\ 05 in Fi^niln^berC) 



/ \ B. Number of fibers. /i^ > 



f 'S.^^ ireofest number in ony root - 100% l'-\j 



'; \....-\^x •^"■" -^ _/^'' V/ V ^ 



'^ 



J I I L. 



_l I I I I I I I I • 



imiriY ¥ n him inniEY iivumiix xnurin nuiY i nraim 

 CERVICAL THOKACIC LCMBAB SACBAL 



J^t£'. I . Curves showing the area in sq. mm. of the cross-section of the ven- 

 tral roots of the left spinal nerves. Each sq. mm. is represented by twenty 

 divisions on the axis of the ordinates. 



Fig. 2. Curves based on the measurements in Table I, the values in each 

 curve being entered in percentages of the greatest area which is taken as loo per 

 cent. One mm. on the axis of ordinates equals i per cent. 



Fig. J. Curves showing in per cent the area of the cross-sections of the 

 ventral roots of the left spinal nerves and the percentage distribution of the num- 

 ber of medullated nerve fibers in each ventral root. 



For publication these figures, originally drawn on the base line of 441.9 mm., 

 have been reduced so as to make base line 96 mm., which is a reduction to about 

 0.22 of the original linear dimensions. 



In order to better compare the areas of the cross-sections 

 entered in Table I, they are exhibited in the form of curves 

 (Figs. I and 2), which are constructed in the same way as were 



