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The sceptical chymist: or chymico-physical doubts and paradoxes, touching the experiments whereby vulgar Spagirists are wont to endeavour to evince their salt, sulphur, and mercury, to be the true principles of things. To which in this edition are subjoyn'd divers experiments and notes about the producibleness of chymical principles / [Anon]. Public Domain Mark. Source: Wellcome Collection.