Sentence:  This is the reason why this water hath no such force when it is carried, as it hath at the spring it self: because the vertue of it consisteth in a spiritual and occulte qualitie, which <WSD>eventeth</WSD> and vanisheth by the carriage. 
Meaning of the word marked with <WSD> tags:  To be emitted or breathed out; to evaporate.