measures about four hundred and twenty-seven 
length, by two hundred and thirty in breadth ; and 
b"*'s low state of the tides, its average perpendicular 
y Sjit above, the surface of the sea is about four feet. Be- 
Ijj the space included in the.se measurements, at very low 
a reef extends about a thousand feet, in a south-west 
j^^t'on, from the higher part of the rock just described ; 
■ , On this reef the light-house is erected. 
the erection of a light- house on the Bell Rock, inde- 
luOently of its distance from the main land, a serious dif- 
Vji *y presented itself, arising from the greater depth of 
lli^or at which it was necessary to carry on the oircrations, 
tljJ* in the case of the Eddystone light-house, described 
i)|. '’6) or of any other building of the same kind, ancient 
tCfj odern, which had been hitherto undertaken. Its de- 
.Ptioi) is as follows : 
Bell Rock Light-house, which has, not improperly, 
O termed tlie Scottish Pharos, is a circular building, the 
r, dation-stone of which is nearlv on a level with tlie sur- 
BELL ROCK LIGHT-HOUSE. 
60X 
the sea at low-water of ordinary spring tides ; and, 
ii^j^®4Uently, at high-water of these tides the building i's 
lit to the height of about fifteen feet. The first two, 
K n ‘^nnrses of the masonry, are imbedded, or sunk 
Vpf took, and the stones of all the courses are curiously 
'®‘*ed and joined with each other, forming one con- 
mass from the centre to the circumference. The 
courses of the work are also attached to each 
|*6ijj ny joggles of stone ; and, to prevent the stones from 
ti5 up by the force of the sea, while the work was 
Vr, ttacfi stone of the solid part of the building had 
it, entering six inches into the 
bored through 
'He? .’®*uediately below, into which oaken tree nails, two 
)! th , '^'HUieter, were driven, after Mr. Smeaton’s plan 
H H Eddystone Light-house. The cement used at the 
So like that at the latter, was a mixture of puzzo- 
lime, and sand, in equal parts, by measure. 
Soj ® stones employed in this surprising structure weigh 
tows to half a ton each. The ground course 
Nish E>rty-two feet in diameter, and the building di- 
k ili>r* *’■ *up> ■"'here the parapet wall of 
I ^'-rii om has a diameter of thirti en feet only. Ii is 
'■Urn the ground course to the height of thirty feet. 
