6o s>f tfyt ggettyanical flDnfiine 



more lax acceptation of the word 10 

 reference to fome other bodies , io 

 refpeft of whom 'twas cold before 5 

 and then fenfibly hot^ becaufe this 

 newly gain'd agitation furpafles 

 that of the parts of our fingers 

 And in this Inftance 'tis not to be o- 

 verlooktj that oftentimes neither 

 the hammer D by which , nor the an- 

 vil 5 on which a cold piece of Iron is 

 forged , ( for all iron does not re- 

 quire precedent ignition to make it 

 obey the hammer ) continue cold* 

 after the operation is ended * which 

 Ihews, that the Heat acquired by the 

 forged piece of iron was not com- 

 municated by the Hammer or Anvil 

 as Hear, but producdin it by moti- 

 on, which was great enough to put 

 fo fmall a body as the piece of iron 

 into a ftrong and confus'd motion of 

 its parts without being able to have 

 the likeoperation uponfo much grea- 

 ter mafles of metal, as the Hammer 

 and the Anvil 3 though if the percuf- 

 fions were often and nimbly renew- 

 ed, aud the Hammer were but finally 



this 



