The CONTENTS. 
VI. Claufula excerpta , ex Hiftoria Variolarum 
quae per Incifionem excitantur, ab E, 
Timoni, M. D. Scripta, F- S'. CommynicaYit 
Sam. Horfeman, M. D. 
VII. An AbftraB of a Letter from Petrus Van 
Mufchenbroek, M. D. F. Ft. S. Frofeffor 
of Matbematicks and AJhonomy in the Univerjity 
of Utrecht, in Holland 5 to Dr. J. T. Defa- 
guliers, F. % S. concerning Experiments made 
on the Indian Magnetick-Sand. 
VIII. An Account of fome ObferVations made in 
London, by Mr. George Graham, F. F S. and 
at Black- River in Jamaica, by Colin Camp- 
bell, Efq^ F. Ft S. concerning the Going of a 
Clock 3 in order to determine the Difference be- 
tween the Lengths o/lfochronal Pendulums in 
thofe Flaces. Communicated by J. Bradley, 
M. A. Aftr. Frof. SaVill. Oxon. F Ft 
IX. A Continuation of an Account of an EJfay 
towards a Natural FUftory of Carolina, and 
the Bahama Iflands, by Mr. Mark Catesby, 
F. Ft 5 . with fome Extracts out of the Sixth 
Set 3 by Dr. Mortimer, Ft & Secret . 
I. Expert • 
