[ 5 2 3 ] 
they began to abate a little in their violence, though 
they were not quite over at fun-fet, I had almoft 
forgot to tell you, that this ftrange phenomenon was 
renewed on Monday morning a little before nine, and 
laded for an hour and an half; but the motion of the 
water was not near fo violent as the day before. 
What is very remarkable, there was not the lead 
breath or gale of wind on Sunday till one o’clock : 
a circumftance, which helped us not a little in our 
obfervations. 
LX XIII. Accounts of the Irregularities of the 
\ Tides at Chatham, Sheernefs, Woolwich 
and Deptford, in Feb. 1756. Commu - 
nicated by the Rt. Hon . George Lord 
Anfon, F. R. S. 
A 
LETTER I. 
SIR, 
Read Feb. 26,/ 1 | N HIS acknowledges the receipt 
I/5 ° X °f your letter of the 21ft in- 
flant ; in return to which I have fent you, for my 
lord Anfon’s information, an account of the irre- 
gularity of the tides, having taken particular notice 
of them by the Lys, a French fhip, having broke 
from her moorings three times in that week. The 
firft time was on Thurfday the twelfth inflant, at 
about ten in the morning, it being then about high 
water, or rather ebb; fo that we could not get her off 
that tide, but attended and hove her off the next, at 
about nine at night, which was fooner than we ex- 
pected 
