The retinae of 90 rabbits were examined chemically and histochemically for succinic dehydrogenase and glycogen. They were also examined histologically Forty-five of the animals received 6,000 r of x-irradiation to the eyes. Forty-five were nonirradiated controls. Five irradiated and 5 nonirradiated control animals were sacrificed by decapitation ½, 1, 2, 4, 6, 12, 24, 48, and 72 hours after radiation.
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