The CONTENTS. 
V. A Letter from Mr. Colin Mac Laurin, 
Math. Prof. Edinburg. F. R. S. to John 
Machin, Aftr. Prof. Grefh. 8 c Seer. P v . S. 
concerning the Defcription of Curve Lines. 
Communicated to the (Royal Society on Decem- 
ber zi 3 1 732. 
VI. A Letter from Stephen Gray, F. R. S . to 
Dr. Mortimer, Seer. R. S. containing Jome 
Experiments relating to Ele<ftr icity. 
VII. An Acount of the Births and Burials 
with the Number of the Inhabitants at 
Stoke-Damerell in the County of Devon. 
Communicated by the Reverend Mr. Barrow. 
VIII. An Extraordinary Cafe of the Foramen 
Ovale of the Heart being found open in an A- 
dult. Communicated by Claudius Amyand,F/^j 
Serjeant Surgeon to his Majefty, and F. R S. 
N. B. The Papers hinted at by Mr. Mac Laurin 
p. 143. are printed inaTreatifeentituIed, Exerci. 
tatio Geometrica de Defcriptione Curvarum : Au- 
thore Gulielmo Braikenridge . Londini, 1 733.4 to. 
LONDON: 
Printed by W. I n n y s and R.Manby, Printers 
to the Royal Society., at theWeft End of St. Taul’s. 
mdccxxxvi. 
