The CONTENTS. 
IV. An Account of fame Obfervations of the Eclipfes 
of the Firft Satellite of Jupiter, compared 
with the Tables , by the fame. 
V* Experiments and Obfervations upon the 
Light that is produced by communicating Elec- 
trical Attra&ion to animal or inanimate Bo- 
dies, together with fome of its moft furprijing 
Fffebls 5 communicated in a Letter from Mr. Ste- 
phen Gray, F.IfS.to Cromwell Mortimer, 
M. D. S. Seer. 
VI. A general Method of deferring Curves, by 
the Interjection of Right-Lines 5 moiling a- 
bout ^Points in a given Plane. In a Letter to 
Dr. Hoadly, by the P(eV. Mr. Braikenridge. 
Ylh Extract of a Letter from M. GeofFroy, 
Che mill. Member of the Royal Acade- 
my of Sciences at Parrs, and F. If S. to Sir 
Hans Sloane, Fart. Trejident of the Royal 
Society j concerning Mr. Seignette’r Sal Pc- 
LYCHRESTUS RupellENsis, and fome other 
Chemical Salts. By T. S. M V. 
I. A Ca~ 
