98 



SHINKISHI HATAI 



TABLE 2— Continued 



In all charts the observed mean values are indicated by either 

 black dots (male) or clear circles (female) while those calculated 

 from the formulas are represented either by continuous (male) 

 or discontinuous (female) lines. Since the calculated values rep- 

 resent the observed data verj^ closely the formulas may be used 

 not only for the purpose of interpolation, but as the basis for 

 the comparison of the growth of the various organs. 



In connection with the amount of fluctuation, it should be 

 recalled that the number of individuals was not large, particu- 

 larly in the case of the heavier rats, in which a greater fluctuation 

 is to be expected, so that with a larger number of cases, the fluctu- 

 ations would probably be much diminished. 



To those using the formulas which are given below, the fol- 

 lowing practical suggestions are offered: 



1. When its value differs markedly from the normal, the body 

 weight should be corrected to the observed body length, as the 

 body length is least modified in animals exhibiting emaciation 

 or abnormal fat deposition. The proper correction can be made 

 according to the following formula (Donaldson '09). 



Body length = 143 log (Bd. wt. + 15) - 134 



