Kellaway. 



Roy. Soc. Proc, B, vol 92, PL 1. 



Fig. 2. — Normal adrenal of pigeon. Osmic vapour preparation (xl40 diameters) 

 showing the continuity of the medullary network. 



FIg. 3. — Adrenal from polyneuritic pigeon ( x 140 diameters) showing excessive cortical 

 enlargement and interruption of medullary network. 



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