John Gray M‘Kendrick
1841–1926
Scottish surgeon. MD, Aberdeen, 1864. Surgeon, Belford Cottage Hospital, Fort William, 1865. Assistant to Hughes Bennett at Edinburgh University, 1870–3. Lecturer in physiology at Surgeon’s Hall and the Dick Veterinary College, Edinburgh, from 1873. With James Dewar, discovered the electric current produced in the retina and optic nerve when a beam of light entered the eye. Professor of the Institutes of Medicine, Glasgow University, from 1876. Fullerian Professor of physiology, Royal Institution of Great Britain, from 1881. FRS 1884.
Source
Nature, 16 January 1926, pp. 93–4
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