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Notes about Volatility and Fixtnefs^ 

 and efpecially about Precipitation p I 

 have given fome little Specimens of 

 the Theorical part of a Philofophi- 

 cal Account of thofe Qualities or 

 Operations, that I hope will not be 

 wholly ufelefs. I know-, it may be 

 pbje&ed, that I (hould have employ- 

 ed for Inftances fome more consider- 

 able Experiments 3 if not Arcana 5 

 but though poffibly I am not alto- 

 gether unfurnifhed with Fuch, yet 

 aiming rather to promote Philofo- 

 phy 3 than appear a Poflefforof ela- 

 borate Procefles, I declined feveral 

 Experiments that required either 

 more skill, or more time , or more 

 expence than could be well expeft- 

 cd from moft Readers , and chofe 

 rather to employ fuch Experiments 

 as may be more eafily or cheaply 

 tried y and 5 which is mainly to be 

 confident , being more fimple are 

 more clearly intelligible^and more fit 

 to have Notions and Theories built 

 upon them j efpecially considering, 



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