CONTENTS. vi* 
XIV. Electrical Experiments made in order to afcertain the non- 
conducting Power of a perfect Vacuum , &c. By Mr. Wil* 
liam Morgan ; communicated by the Rev. Richard Price, 
EL.D. R oReB. p, 2jz 
XV. Experiments and Obfervations relating to Air and Water * 
By the Rev . Jofeph Prieftley, LL.D. F.R.S. p, 279. 
