Hardesty, spinal Ganglion Cells. 



47 



lO fibers in the trunk and dorsal branches for each gram gained 

 in weight. This estimation was based on upon counts from 12 

 specimens. 



TABLE V. 

 (White Rat) 



.- o 



1) ;z; 



O rt C 



S csi rj 



B 



a i2 Si 



t« 1) 



0) .4:: 



^:= 





cv; .0 p 



Table V. Compiled from figures given by Hatai ('02) Table VII and ('03) 

 Table III for the Vlth cervical, IVth thoracic and Ilnd lumbar nerves of four 

 white rats of different ages. Constructed in the same way and showing the same 

 relations as Table IV. (Note: In the two papers of Hatai there are some 

 slight discrepancies in the body weights. For example, in one paper the results 

 from a 68.5 gram rat are given in the other paper as obtained from one of 69 grams, 

 and a specimen of 24.5 grams in one paper is given 25.4 in the other. These are 

 considered oversights or misprints and of little importance anyway. The only 

 specimen mentioned in the second paper as additional had a weight of 264.3 

 grams and it is not included here since its ganglion cells were not counted.) 



These indications of the rate of gain of the nerve fibers with 

 growth suggest similar estimations for both the nerve fibers and 

 the ganglion cells of the nerves dealt with in this paper. The re- 

 sults of such estimations and the method by which they are made 

 are shown in Table IV. And in order to compare the conditions 



