CO 

 Experiments and Notes 



ABOUT THE 



Mechanical Origine 



o R 



PRODUCTION 



OF 



HEAT ^d COLD. 



S E C ti I. 



About the Mechanical Production of 

 Cold. \ 



HE AT Be COLD b^ing generally 

 lookt upon as the moft a&i ve 

 among Qualities/rom which 

 many other Qualities are deducible^ 

 and by which many of Nature's 

 Phenomena > efpecially among the 

 A 2 Peri- 



