CONTENTS. 
1775- ; concerning an extraordinary Motion in 
the hVaters in the Lake Ontario in North- Ame- 
rica. p. f-M-. 
LXXVII. Sin Extra El of a Letter from Monf. Gro- 
veftins, Mafler of the Horfe to his R. H. the 
\ Prince of Orange, Lieutenant-General , Com- 
mandant of the Forces , concerning an Earth- 
quake felt by him fe If at the Hague, on Wednef- 
day the \%th ofEch. 1756. Tran fated from the 
French, and communicated by the Rev. William 
Parker, DAD. F. R. S. p. 5-44. 
LXXVIII. An Account of an Earthquake felt in 
Holland, Feb. 18, 1 756; in a Letter from Monf 
Allamand, Frofeffor of Natural Fhilpfophy at 
Leyden, and F. R. S. to Mr. Tremblcy, F. R, S. 
Dated at Leyden, Feb. 27, 1756. Tranfated 
from the French. p. 447. 
LXX1X. An Account of the Earthquakes felt at 
Brufl’els ; in a Letter from John Pringle, M. 4 D . 
F. R. S. to Thomas Birch, D. D. F. R. S. 
p. y+6. 
LXXX. An Account of the Sinking of a River near 
Pontypool in Monmouthfhire 5 m a Letter from 
Mr. Edward Matthews, to the Commiffioners of 
the Excife. p. 547. 
LXXX1. An Account of the Agitation of the IVa - 
ters, on the if of November 1 75-4, in Scot- 
land and at Hamburgh. Communicated by John 
Pringle, M. D. F. R. S. in a Letter to Thomas 
Birch, D. D. Secret. R. S. p. yyo. 
LXXXII. Microfcopical Obfervations : In a Letter 
from Edward Wright, Efq\ to Mr. Peter Col Un- 
ion, F. R. S. dated at Paris, December 26, 175-y. 
P- 573- 
LXXX11I 
