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CM. JACKSON 



Controls at 3 weeks. 



Constant 3 to 10 weeks 



Controls at 10 weeks. 



Fig. 4 Diagram representing the average relative (percentage) weights of 

 the various systems (integument, skeleton, musculature, viscera and 'remainder') 

 in albino rats held at constant body-weight from the age of three to ten weeks, 

 and in controls at three and at ten weeks of age. 



