[ 645 ] 
quia fupponere licat, hanc in luna non Temper eflb 
asqualem, infertur, differentiam temporis appulfus 
umbrae non in omni eclipfi lunari pofle efle aequalem, 
quod demum convenire videtur duplici meae obferva- 
tioni, ut ex adnotatis temporum difFerentiis liquet. 
Haec mea eft circa propofttum phaenomenon opi- 
nandi ratio. 
LXXXIX. Ohfervations upon a flight Earth- 
quake, tho very particular , which may 
lead to the Knowlege of the Caufe of great 
and violent ones , that ravage whole Coun- 
tries, and overturn Cities, By John An- 
drew Peyffonel, M D. F+R.S. c Tranf~ 
lated fro??i the French. 
Read April. 20 . Went to make my obfervations upon- 
*75 8 - the natural hiftory of the fea j and 
when I arrived at a place called the Cauldrons of 
Lance Caraibe, near Lancebertrand, a part of the. 
ifland of Grande Terre Guadaloupe, in which place 
the coaft runs north-eaft and fouth-weft, the Tea 
being much agitated that day flowed from the north- 
weft. There the coaft is furnifhed with hollow 
rocks, and vaults underneath, with chinks and cre- 
vices : and the Tea, pufhed into thefe deep caverns 
by the force and agitation of the waves, comprefles- 
the air, which, recovering its fpring, forces the wa- 
ter back in the form of the moft magnificent foun- 
tains ; 
