FORMULAS 295 



The values thus obtained are subtracted from the computed 

 values for the male at the corresponding ages. 



From fifty to sixty-five days no correction is made. 



From sixty-five days to one hundred and thirty-five days, 

 correction is made according to the formula (52 b). 



Correction {to he added) = 0.823 log {Age + 1) - 0.000542 

 {Age + 1) - 1.4616 (52 b) 



From one hundred and thirty-five to one hundred and sixty- 

 five days the correction is uniform thus: 



Correction {to be added) = 0.22 (52 c) 



From one hundred and sixty-five to three hundred and sixty- 

 five days correction is made by the following formula : 



Correction {to he added) = 0.22 + 0.0005 {Age - 165) (52 d) 



The foregomg (50) -(52 d) replace the formulas given in the 

 paper by Donaldson, '10. 



Formulas (50)-(52 d) were used for table 157. 



GROUP II. NORWAYS 



FIRST division: formulas based on size 

 Body Length on Body Weight — Norway (Donaldson and Hatai, '11) 



Body length {sexes combined) = 159 log {Bd. wt. + 18) - 165 (53) 



The body length for the male is 0.4 per cent above the value 

 given by formula (53) and that for the female 0.4 per cent below. 

 Formula (53) with above corrections was used for graphs in 

 chart 61. 



Body Weight on Body Length (Donaldson and Hatai, 'U) 



By transforming formula (53) and introducing the correction 

 for sex we obtain: 



