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of peftilential Difeafes. 47 this fubtile Union fhould be in fome Men- Hire diffolved, and the fofter and more humid Parts broke and exhaled, fo much as to leave the mare rigid and faline ones not only unfit to lubricate thofe Elaftick Threads, wherein they refide, but iharp and pointed enough to fHmulatej contraft, and harden them into all Lofs of Motion, A S the Deftru&ion likewife of this Nexus in fo fubtile a Fluid leaves the faline Parts capable of injuring even that OEconomy which gave it Exiftence, fo may its Volati- lity favour its Efcape in a great Meafure by Tranfpiration, fb as to affect alfo other Per- fons within its Reach ^ and Thefe, with all other Particles of like Nature, which hy an Over-Agitation, and fermentative Motion of the animal Fluids, are feparated from the fofter and lubricating Compofitions with which they were naturally joined, and which by their Volatility tranfpire and float in the Air, we take to be the true conta- gious Miafmata, that convey, propagate, and continue a Pc ft Hence, after the Caufe. Erfl rai- fing it ceafes. NOR will this feem itrange to any who are accuftomed to refleft, how may Sub- it a nee?