286 GROWTH OF PARTS AND ORGANS 



1 per cent to represent its weight in the male. By using this 

 procedure, the data on the weights of the spinal cord in table 144 

 have been obtained. 



Diameter of Second Cervical Spinal Ganglion Cell Nucleus on 

 Diameter of Cell Body (Hatai, '07 b) 



Correlation between diameter of cell body and diameter of 

 nucleus in jii — in spinal ganglion cells of second cervical nerve. 



Diameter of nucleus in n = 



12.2939 i 1.0252 + 0.3564 ( ^ j - 0.0758 ( ^ . . ,^^. 



where x is the diameter of the cell in n and 1 is a half range of the 

 variates. 



As the value of 1 is 10, the formula (14) may be transformed 

 by a series of steps here omitted, to read 



Dc b~29 ] 



20 j "'"1 20 j (14 a) 



Dn = 12.6 + 4.3 ^-- -). _ qJ^^^^^X 



Where D n = Diameter of nucleus in /x. 

 and D c b = Diameter of cell body in m- 

 See table 60. 



Weight of Both Eyeballs on Body Weight (Hatai, '13, p. 112) 



Weight of both eyeballs {sexes combined) = 



0.000428 Bd. wL + 0.098 log Bd. wt. - 0.041 (15) 

 Formula (15) was used for table 144. 



Weight of Heart on Body Weight (Hatai, '13) 



Weight of heart {sexes combined) = 

 0.0026 {Bd. wt. + 14) + 0.249 log {Bd. wt. + 14) - 0.336 (16) 

 Formula (16) was used for table 145. 



