of %>m ant) €olfc 71 

 ex per. xii. 



If Experiments were made after 

 the above recited manner with 

 Sal Artnoniac and other mineral bo- 

 dies than Iron and Copper 3 'tis not 

 improbable, that fome of the emer- 

 ging Phenomena would be found to 

 confirm what has been faid of the 

 Intereft of Texture, ( and fome few 

 other Mechanical Affe&ions) in the 

 Production of Heat and Cold. Which 

 Conjecture is fomewhat favoured by 

 the following Trial* Three ounces 

 of Antimony 3 and an equal weight 

 of Sal Armoniac being diligently 

 powdered and mixt> were by degrees 

 of fire fublimed in a Glafs-vefFel, 

 by which Operation we obtained 

 three differing Subftances 5 which we 

 caufed to be feparately powder'd, 

 when they were taken out of the 

 Subliming Glafs, left the air or tim<e 

 fhould make any change in them 3 

 and having before put the ball of a 



good 



