58 ANSWERS to the B J E CTIO NS, Sec. 



other principles, which do not require any profound knowledge 

 of that inftrument. It is only to thefe that I have anfwered ', 

 and I beg it to be underftood, that the theory which I have en- 

 deavoured to eftabliih, is juft now as open to the experiments 

 of the hygrometer, whether for being fupported by them or 

 overthrown, as if nothing had been written upon the fub- 

 Jed. 



IX. 



