[ 53 ° ] 
LXXIV. Accounts of the Irregularities of the 
Tides in the River Thames, on the 1 2th 
and i$th of February, 1756. Commu - 
nicated by Robert Dingley, Efq\ F. R. S. 
S I R, 
Read Mar. 4, yt Ccording to your defire, I fhall fet 
JL\. down m writing the variations, that 
happened in the tides the 12th and 1 3th of laft month, 
according to my own obfervation, and from others 
of whom I enquired ; viz. 
Thurfday Feb. 12, the time of high-water at 
London-bridge that day was about half after eleven, 
and flowed no higher at Weftminfter-bridge at high- 
water than the low-water is, at times when extraor- 
dinary land floods are out, and the wind to the North- 
ward. The wind during the whole flood was at 
W.S.W.and blew hard. 
On the 1 3 th it was high-water at London-bridge 
rather before one o’ clock, and continued ebbing till 
four, when the water was gone from the Cuftom- 
houfe- wharfs, where I was with a merchant’s clerk, 
confulting how to get fome goods aboard my craft, 
in order to fend them down to the fhip, my fervant 
having negleCted to put my boat under the crane be- 
fore the water had left the wharf. During this par- 
ley, the water moft unexpectedly flowed again di- 
reCtly; and without that extra phenomenon fetting 
my boats afloat, it would have been impofiible to 
have fhipped the goods that day, being feven large 
bales and twenty thoufand ounces of filver. 
During 
O 
