On the Production of Cataract in Frogs by the Administration of Sugar

subcuticular an of in its This fluctuating was the syrup, augmented by the exosmosis of fluids from the vessels or extra-vascular tissues, or both. As the frog became more and more feeble, the larger part of this collection of fluid disappeared. The trog died at the close of ten bom's. During the latter portion of this time my attention was arrested by the white appearance of the frog ’ s eyes, which, on close examination, proved to be cataractous; the cornea remaining perfectly clear and trans ­ parent. Experiment. — The second frog wa.s treated with repeated doses of syrup given internally. The plkenoinena of exosmosis were far less marked in this case, but large quantities of mucus collected in both stomach and oeso ­ phagus, and were finally disposed of, in part, by vomiting. The mode of death did not differ from that last described. The cataractous ajtpearance was not seen until just after the frog's death. Experiment. — The third frog was placed in syrup, so that when seated in the usual posture the syrup covered its hind legs. Death took place in seventeen hours, but the cataract was not formed as usual, or, at least, was not externally visible. I did not examine it.< eyes post-mortem. of double cataract was in a usual means. the cataract first began to be it five hours the opacity eight hours it diminished perceptibly, but, was changed twice day, some traces of the cataract were visible during sev eral frog entirely