1. My thanks are due to Mr. H. Hawley of the King Institute of Preventive Medicine, Guindy, for the microphotographs, and to the Souith Indian Branch of the British Medical Association for meeting the expenditure associated with the animal experiments
2. male, aged 21 years, came to the Birmingham Eye Hospital on December 7, 1926, and was examined at 10 a.m. He stated that at 7.-40 a.m. the vision of the left eye suddenly failed and that for some time he had not the slightest perception of light. In about half an hour he began to see again, but even now the sight is not normal. He suffers from morbus cordis;W, C.J.