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Show 1885.] MR. J. B. SUTTON ON HYPERTROPHY. 433 long ago ; the important fact for my purpose is-that in this, as 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 right 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. double the usual size. The kidney, in consequence of the loss of fellow, has had to perform twice the amount of work usually required of it, and has doubled its bulk as a result of this increased |