Hatai, Spinal Ganglion Cells of Rat. 



473 



defect are not equally probable. It is therefore evident that n 

 order to represent the data in hand we must find a curve which 

 is able to represent the odds against any given deviation. 



It has also been shown by Pearson ('95, '01) that the assign- 

 ment of a given distribution of frequency to any one of the six 



4.75 6 8 10 12 14 16 18 micra. 



Fig. 2. Frequency polygon and fitted curve for variation in the diameters of the nuclei. 



types of his skew curves depends on the value of the analytical 

 constants k^; k^; ^^ and /?2. As is shown in Table I, in the case 

 of the cell-body we have the following relations: 



K^ < o; /C2 < o and /5i > o 



