Anatyfis of the Air. 



169 



coalefcc, whereby they arc rendred toogrofs 

 to enter the minute vcficlcs; which are alfo 

 niuch con traded, as well by the lofs of the 

 elafticity of the contained air, as by the con- 

 traction occafioncd by the Simulating, acid, 

 fulphurcous vapours. And 'tis not impro- 

 bable that one great defign of nature, in the 

 ftru&ure of this important and wonderful 

 vifcitSy was to frame its veficles 10 very 

 minute, thereby effectually to hinder the 



ingrefs of grofs feculent particles, which 

 might be injurious to the animal oeconomy. 

 This quality of falts ftrongly to attract 

 fulphurcous, acid and other noxious particles, 

 might make them very beneficial to man- 

 kind in many other refpects. Thus in fe- 

 veral unwholfome trades, as the fmelters 

 of metals, the cerufs-makers, the plumbers, 

 &c. it might not unlikely be of good fervice 

 to them in preferving them in fome meafure 

 at leaft, from the noxious fumes of the ma- 

 terials they deal in, which by many of the 

 foregoing experiments we are aflured muft 

 needs coalefcc with the claftick air in the 

 lungs, and be lodged there j to prevent 

 which inconvenience the workmen might, 



while they are at work 3 make ufe of pretty 



broad 



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