Surgery, London, 1844, introductory chapter. For Wier, see authorities given in my previous chapter. Although the new idea was thus resisted, it must have taken some hold upon thoughtful men, for we find that in the second half of the same century the St. Vitus's dance and forms of demoniacal possession akin to it gradually diminished in frequency and were sometimes treated as diseases. In the seventeenth century, so far as the north of Europe is concerned, these displays of "possession" on a great scale had almost entirely ceased; here and there cases appeared, but there was no longer the wild rage extending over great districts and afflicting thousands of people. Yet it was, as we shall see, in this same seventeenth century, in the last expiring throes of this superstition, that it led to the worst acts of cruelty.(388) (388) As to this diminution of widespread epidemic at the end of the sixteenth century, see citations from Schenck von Grafenberg in Hecker, as above; also Horst. While this Satanic influence had been exerted on so great a scale throughout northern Europe, a display strangely like it, yet strangely unlike it, had been going on in Italy. There, too, epidemics of dancing and jumping seized groups and communities; but they were attributed to a physical cause--the theory being that the bite of a tarantula in some way provoked a supernatural intervention, of which dancing was the accompaniment and cure. In the middle of the sixteenth century Fracastoro made an evident impression on the leaders of Italian opinion by using medical means in the cure of the possessed; though it is worthy of note that the medicine which he applied successfully was such as we now know could not by