92 



GROWTH OF PARTS AND ORGANS 



0.5 



0.3 



0.1 



Chart 10 Showing the weight of eyeballs of the male albino rat according to 

 body weight. The observed weights are represented by 149 male rats (Jackson). 

 Table 68, formula (13). 



• Observed weight. Calculated weight. 



5. Organs with a nearly uniform growth after the first very early 

 phase of rapid growth — heart, kidneys, liver, spleen, lungs (blood), 

 alimentary tract, hypophysis, suprarenals and thyroid. 



In case of all of the organs to be described the preparation was 

 carried on beneath a glass hood to prevent drying. The organ 

 was weighed in a small glass stoppered bottle and the weight was 

 taken to a tenth of a milligram. 



The weight of the heart on body weight. Technic: The heart 

 was removed after cutting all its vessels close to their proximal 

 ends. It was then opened by longitudinal slits through its walls 

 and the clots removed from the cavities thus exposed. 



The graph given in chart 11 and the values in table 69 have 

 been determined by formula (14). 



The weight of the heart is closely correlated with that of the 

 body and no difference according to sex has been noted. Hatai 

 (13); Jackson (13). 



Weight of both kidneys on body weight. Technic: All vessels 

 were cut close to the hilum and any superficial fat removed. 



The graph given in chart 12 and the values in table 69 were 

 determined by formula (15). 



