Friern Hospital, London: a patient being tested for his ability to raise his leg straight. Photograph, 1890/1910.

Friern Hospital, previously known as Colney Hatch Asylum, a psychiatric hospital, opened in Barnet, North London in July 1851. Initially it held 1,250 patients, but by the time it was renamed as Friern Hospital in 1937, it had been enlarged and held 2,700. The hospital closed c. 1995