William Harvey's book 'De motu cordis',1628.
© Science Museum / Science & Society Picture Library
William Harvey's (1578-1637) book 'De motu cordis', 1628, Frankfurt, Germany. Also known as 'On the Motions of the Heart and Blood', which concluded that blood circulates. Shown in its display case (case partially blocks view) in the Upper Wellcome Gallery, Science Museum, London.