Recueil des memoires et conferences qui ont este presentees a Monseigneur le Dauphin pendant l'anee M.DC.LXXII[-MDCLXXIV]
A Paris : Chez Frederic Leonard, Imprimeur ordinaire du Roy, rue S. Jacques, a l'ecu de Venize, 1672[-74]
"Denis studied medicine at Montpellier, but there is no record of any degree. He was attached to the Chambre royal. He had the title of ordinary consulting physician to the king. He taught philosophy and mathematics in Paris. Beginning in 1664, Denis gave public lectures in physics, mathematics and medicine at his home in Paris. In 1673 he was invited to England by Charles II, but later returned to France to continue his interests in science and mathematics" (The Galileo Project).
"The transfusion of blood in men was of the greatest interest to Denis. It gave him his celebrity, and started the greatest medical controversy of that time. His fourth transfusion patient, was a madman, who died during his third transfusion. He may have been poisoned by his wife, who, perhaps to divert suspicion from herself, or at the suggestion of the many Paris physicians antagonistic to Denis, accused Denis of having killed her husband. Denis brought the case before the court, and a judgment rendered in 1668 cleared him of any wrongdoing but forbade the practice of transfusion of blood in man without permission of the Paris Faculty of Medicine" (Dictionary of Scientific Biography).