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CXV. An Account of an Earthquake felt 
at Cclen, Leige, Maeftricht, &*c. on the 
loth of November, 1756 : In a Letter 
from Mr. Abraham Trembley, F. R. S. to 
Thomas Birch, D. D. Secretary to the 
Royal Society. Iranfated from the F rencli. 
SIR) Hague, Nov. 26, 1756. 
Read Dec. i6./~ INHERE was felt, on the 19th of 
17561 JL this month, at three in the morris 
ing, a fhock of an earthquake, at C'olen, Leige, 
Maeftricht, in the country of Limburg, and, -as 
appears, in all that between the Meufe and the 
Rhine. c v 
This fhock continued but a fhort time : and 
there is no account at prefent of any damage done 
by it. 
One of almoft: the fame kind was felt in the fame 
places on the 3d of June. 
You faw by the account, which I fent you on the 
lith of May, that earthquakes were very frequent 
in this country in the beginning of this year. The 
fhock, which has been lately felt in thefe parts, as 
well as in Portugal, fhews, that the caufe of earth- 
quakes is ftill adfive. 
I have not yet procured the fequel of the obferva- 
tions made in Valais on that fubjed. 
I know, that perfons very attentive obferved, that 
in the neighbourhood of Lifbon for feveral days after 
the ift of November iqff, thofe, who lay upon the 
Vol. 49. 5 X ground, 
