Note 305 — Chapter XIII · THE RISE OF MODERN FREETHOUGHT—(Continued)

Among his other practical services to rationalism was a curious experiment, made in a village of the Lower Alps, by way of investigating the doctrine of witchcraft. A drug prepared by one sorcerer was administered to others of the craft in presence of witnesses. It threw them into a deep sleep, on awakening from which they declared that they had been at a witches’ Sabbath. As they had never left their beds, the experiment went far to discredit the superstition.305 One significant result of the experiment was seen in the course later taken by Colbert in overriding a decision of the Parlement of Rouen as to witchcraft (1670). That Parlement proposed to burn fourteen sorcerers. Colbert, who had doubtless read Montaigne as well as Gassendi, gave Montaigne’s prescription that the culprits should be dosed with hellebore—a medicine for brain disturbance.306 In 1672, finally, the king issued a declaration forbidding the tribunals to admit charges of mere sorcery;307 and any future condemnations were on the score of blasphemy and poisoning. Yet further, in the section of his posthumous Syntagma Philosophicum (1658) entitled De Effectibus Siderum,308 Gassendi dealt the first great blow on the rationalist side to the venerable creed of astrology, assailed often, but to little purpose, from the side of faith; bringing to his task, indeed, more asperity than he is commonly credited with, but also a stringent scientific and logical method, lacking in the polemic of the churchmen, who had attacked astrology mainly because it ignored revelation. It is sobering to remember, however, that he was one of those who could not assimilate Harvey’s discovery of the circulation of the blood, which Descartes at once adopted and propounded.