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 no we may by these explaine all the visions that are mentioned by writers? Whether these wonderfull effects, which we attribute to demons or spirits, may proceed from these figures, or not? and then, whether they have any power at all, or not? and if so, whence they have it."

Of the instances which are recorded of this Palingenesia, as it was called, a great number may certainly be explained by the imagination of the experimentalist, as Boyle perceived. Et sane magnopere vereor, says that good man, ne qui se ejusmodi plantarum simulacra in glacie vidisse projitentur, imaginationem non minus quam oculos ad hoc spectaculum adhibuerint. And of this his own