emergency of fuch odours upon the 

 mixture of Ingredients, as neither of 

 them was apart endowed with, we 

 caufed the fubftanee that remained 

 behind in the Retort (in the form of 

 a thin extradV) after one of the new- 

 ly mentioned Diftillations to be far- 

 ther preffed by a ftronger fire, which 

 forced moft of it over, partly in the 

 form of a thick Oil, and partly in 

 that of Butter > both which we keep 

 together in the fame Vial 3 becaufe 

 their odour is neither that of Oil of 

 Turpentine, nor that of Brimftone, 

 but they fmell exceedingly like the 

 diftilled Oil of Bees- wax. 



EX PER. IV. 



About the produUion of [owe Odours 

 by Local motion, 



I Shall not now examine, whether 

 the Local motion of an external 

 Agent may not, without materially 

 concurring to the operation, pro- 

 A 4 duce, 



