Note 647 — Chapter XXVI

In the first volume of this work, p. 643, I have observed that Levasseur had come much nearer to the theory of a general circulation than Servetus. But the passage in Levasseur, which I knew only from the quotation in Portal, Hist. de l’Anatomie, i., 373, does not, on consulting the book itself, bear out the inference which Portal seems to deduce; and he has, not quite rightly, omitted all expressions which he thought erroneous. Thus Levasseur precedes the first sentence of Portal’s quotation by the following: Intus (in corde) sunt sinus seu ventriculi duo tantum, septo quodam medio discreti, per cujus foramina sanguis et spiritus communicatur. In utroque duo vasa habentur. For this he quotes Galen; and the perforation of the septum of the heart is known to be one of Galen’s errors. Upon the whole, there seems no ground for believing that Levasseur was acquainted with the general circulation; and though his language may at first lead us to believe that he speaks of that through the lungs, even this is not distinctly made out. Sprengel, in his History of Medicine, does not mention the name of Levasseur (or Vassæus, as he was called in Latin) among those who anticipated, in any degree, the discovery of circulation. The book quoted by Portal is Vassæus in Anatomen Corporis Humani Tabulæ Quatuor, several times printed between 1540 and 1560.