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of lateral germens than yet infifted on, (and 

 therefrom unitedly to advance another pro-- 

 polition I defer here fpeaking of) Iq 

 order to which former, it is apparent from 

 all poilulata relating to the effedls of rarefied 

 air in all mixed bodies, or to fpeak in the 

 language of naturaltjls^ as they are the paf- 

 fions of the fame : That the rarefaftion of 

 the air therein proceeds firom the Influence 

 of fome portion of fire ; the fame being in- 

 deed to be concluded from what has before 

 been faid : But I am come now more com- 

 prehenfively to intimate, that fire in the open- 

 ing, dilates the body of the air, and what- 

 ever is therewith joined fph eric ally ; as in 

 the bubbles of boiling water, and the fame 

 will continue fo extended, more laflingly in 

 liquors of a vifcous conftitution, as the fep 

 of Oaks muft be granted to be. Hence when 

 liquids of any kind are rarefied to a great 

 degree, and at the fame time are contained 

 in a veflTel, whofe parts are refiftant to a 

 circwnplojion (if it makes me not guilty of 

 verbal coinage) of the air within 5 the 

 weakefl fide thereof will break — I would 

 not by the fads lafl urged, be thought to be 

 difguifing the prior knowledge of others, as 

 I recently 



