CONTENTS. vu 



XIV. Ele5frical Experiments made in order to ajcertain the non- 

 condubling Power of a perjedl Vacuum^ &c. By Mr. Wil- 

 liam Morgan ; communicated by the Rev. Richard Price, 

 LL.D. F.R,S, p. 272 



XV. Experiments and Ohfervations relating to Air and Water ^ 

 By the Rev. Jofeph Prieftley, LL.D. F.R,S. p. 279, 



