Sentence:  Before I leave "Switzerland" I cannot but observe, that the Notion of Witchcraft reigns very much in this Country. ... The People are so universally <WSD>infatuated</WSD> with the Notion, that if a Cow falls sick, it is Ten to One but an Old Woman is clapt up in Prison for it ... 
Meaning of the word marked with <WSD> tags:  Excessively fond of or enthusiastic about (something).