The main body of the goniometer is semi-circular and has a scale from 0 to 180 degrees. It has a stationary arm that is placed against the inactive part of the joint and a moving arm that is aligned with the mobile part of the joint. ]]>

The blood circulator was invented by Dr Gerald Joseph Macaura (1871-1941). Dr Macaura claimed that the blood circulator could cure many ailments including rheumatism, heart disease, asthma and deafness, although these claims were unproven. He went by the title ‘Dr. G. J. Macaura, F.R.S.A., of the National Medical University, Chicago.’ In later years it emerged that Macaura was not medically qualified. He was prosecuted for fraud and the illegal practice of medicine in France in 1914.

This device is held in a cardboard box, with the writing ‘Dr Macaura’s Blood Circulator’ on the lid along with an illustration of the device. ]]>