ALBINO RAT VISCERA, GLANDS, EYEBALLS: WEIGHTS 101 



Chart 2 Showing the weight of kidneys of the male albino rat according to 

 body weight. The observed weights are represented by 136 male rats. 

 • Observed weight. Calculated weight. 



and it is usually low when the rat is large. A change in the rela- 

 tive weight of the heart is usually accompanied by a corresponding 

 change for all the other organs. 



2. Kidneys. The growth of the kidneys in weight is represented 

 by the following formula: Weight of kidneys = 



0.00718 (Bd. wt. - 3) +0.132 log (Bd. wt. - 3) - 0.009 



The constants of the formula were determined from 136 male 

 rats and the relation between observed and calculated values is 

 shown in chart 2. We notice in this case a much greater fluctua- 

 tion than in the case of the heart, but at the moment no ade- 

 quate explanation for this can be given. Possibly it is due to 

 the neglected factor of age. 



