Execution by electrocution, performed using an electric chair, is an execution method originating in the United States in which the condemned person is strapped to a specially built wooden chair and electrocuted through electrodes fastened on the head and leg. This execution method, conceived in 1881 by a Buffalo, New York, dentist named Alfred P. Southwick, was developed throughout the 1880s as a humane alternative to hanging and first used in 1890. This execution method has been used in the United States and, for a period of several decades, in the Philippines (its first use there in 1924, last in 1976). (source)