CONTENTS. 
LXXV 1 . A Letter from Mr. Rich. Brooke, Surgeon* 
to James Parfons, M. D. Secretary to the Royal- 
Society for foreign Correfpondetice , concerning 
Inoculation, p. 470. 
LXXVII. A Sequel of the Cafe of the Light Ho- 
nourable Horace Walpole, Efq* y relating to the 
Stone , fmce his firfl Account in April 1750. 
P- 472. 
LXXVIII. Part of a Letter from Mr. john Parker, 
an Englifh Painter at Rome, to his Father at 
London, concerning the late Eruption of Mount 
Vcfuvius. Communicated by Mr. Henry Baker, 
F.R.S. P- 474 - 
LXXIX. The Cafe of a Piece of Bone , together 
with a Stone in the Bladder , fuccefsfully ex- 
tracted by Mr. Jofeph Warner, F.R.S. and Sur- 
geon to GuyV Hofpital , p. 47 y. 
LXXX. An Account of a Water- Spout, raifed off 
the Land , in Deeping-Fen, Lincolnfhire. By the 
Rev. Mr. Benjamin Ray, of Cowbit near Spald- 
ing, in that County 3 communicated to the So- 
ciety at Spalding on the 7 of May 1752. /^Mau- 
rice Johnion, Efq i and by him to the Royal So- 
ciety, p. 477. 
LX XX I. A Defer ip t ion of Two Methods , by which 
the Irregularity of the Motion of a Clock , arifing 
from thelnfuence of Heat and Cold upon the Rod 
of the Pendulum, may be prevented. By john 
Ellicor, F. R. S. p. 479. 
LXXXII. A Defer ip t ion of a new Tackle, or Com- 
bination of Pul lies. By Mr. J. Smeaton, p. 494. 
LXXXI 1 I. ExtraCl of a Letter from Wm. Dixon, 
Efq, F. R. S. to Mr. W. Watfon, F. R. S. 
from Loverfall ?iear Doncaftcr in Yorkshire, June 
' I 
iv * 9 
