IN our following Treatise of Magnetism we have collected and arranged in order some valuable and secret things out of the writings of that most learned chemist and philosopher Paracelsus, who was the ornament of Germany and the age he lived in. Likewise we have extracted the very marrow of the science of Magnetism out of the copious and elaborate works of that most celebrated philosopher (by fire) Van Helmont, who, together with Paracelsus, industriously...