1885.] 



MR. J. B. SUTTON ON HYPEKTROPHY. 



433 



long ago ; the important fact for my purpose is — that in this, as in 

 similar cases of single kidney, the size and weight of the persistent 

 organ far exceeds the normal, and in the majority of instances is 



Fig. 1. 



The cloaca and left kidney of a Fowl. The rigbt one had disappeared, leaving 

 merely the ureter u, with a small collection of tissue at its summit to 

 testify that a right kidney had existed : o, the oviduct. The persistent 

 kidney is twice the natural size. 



douhle the usual size. The kidney, in consequence of the loss of its 

 fellow, has had to perform twice the amount of work usually re- 

 quired of it, and has doubled its bulk as a result of this increased 



