C 355 ] 
the water was, during the whole time, attended with 
a great perturbation of the fand from the hpttom of 
the canal, and with a great noife, likened by the 
gardeners to that of water turning a mill. During 
the whole time the weather was remarkably ftill, 
there not being the leaft wind; and there was no 
tremor or motion of the earth felt on the fides of the 
canal. This is the fubftance of the account I col- 
ledfed from my gardeners ; I being, when this appear- 
ance was obferved, in London. 
The canal is near 700 feet long from weft to eaft, 
and is about 58 feet wide: there is a fmall fpring, 
which conftantly runs thorough it. The water at 
the eaft end, where this appearance was obferved, 
ufually pens from two to four feet, gmwing gradu- 
ally deeper to the weft end, where it pens to about 
ten feet. No motion was taken notice of in the 
water at the weft end of the canal. The firft vibra- 
tion, which drove the water over the grafs walks, was 
from fouth to north. The grafs walk on the north 
fide of the eaft end of the canal is inches, and 
that on the fouth ftde about ten inches higher than 
the ufual level of the water: the higheft part of the 
walk, over which the water flowed, is about 20 inches 
above the water-level. 
I am informed, that the water was affeded about 
the fame time in the following places. 
In a mill-pond, at Medhurft in Suftex-, the hidden 
agitation and fwell of the water rolling toward the 
mill was fo remarkable, that the miller im.agined 
a fluice had been opened at the upper end of the 
pond, and had let a back-water into it; but upon 
fearch it was found to be fhut as ufual. Below the 
Z z 2 mill 
