The CONTENTS. 
X. A total Fclipfe of the Moon, obfervcd 
Dec. 2. 1750. in the Morning , in the 
Strand, London, about 5" of lime Weft of 
St. PaulV, and 2 y' 1 W ft of the Royal Ob- 
fervatory at Greenwich ; by Dr. Bevis and 
Mr. James Short F. R . S. p. 5.75 
XI. An Account of fome Experiments ,* made 
by Benjamin Robins Efq\ F. R. S. Mr. 
Samuel DaCofta,^W fever al other Gentle- 
men, in order to difcover the Height to 
which Rockets may be made to afcend , and 
to what Diftance their Light may be Jeen ; 
by Mr. John Ellicott F. R. S. p. 578 
XII. Several Papers concerning a new Semi- 
Metal, called Platina; communicated to 
the Royal Society by Mr. Wm. Watfon 
F. R. S. p. 584 
XIII. An Account of a very large human 
Calculus, by William Heberden M. D . 
F. R. S. and Fellow of the College of 
Phyficians, London. p. 5 96 
XIV. A Letter from the Rev. Charles Lyt- 
telton LL.D. and F R.S. Dean of Exe- 
ter, to the Prefident, concerning a non- 
defcript petrified Infedt. p. 598 
XV. 
