STONEHENGE. 
603 
“e light is very powerful, and is readily seen at the dis- 
of seven leagues, when the atmosphere is clear. It 
^ oil, with Argahd burners, placed in the focus of sil- 
a 'plated reflectors, measuring two feet over the lips, the 
Surface being hollowed, or wrought to the parabolic 
To the end that this splendid light may be the more 
distinguished from all the other lights on the coast, 
\h|^. '’^Sectors are ranged on a frame with four faces, or sides, 
by a train of machinery, is made to revolve on a 
ii;.|.P®udicular axis once in six minutes. Betw'een the ob- 
?'■ and the reflectors, on two opposite sides of the re- 
O'tg frame, shades of red glass are nterposed in such a 
that, during each entire revolution of the reflectors, 
Appearances, distinctly differing from each other, are 
Aced : one is the common brigkf light familiar to all ; 
the other, or shaded sides, tlie rays are tinged of a 
These red atid bright lights, in the course of 
iil A revolution, alternate witli intervals of darkness, which, 
^0it beautiful and simple manner, characterize this 
u farther warning to tne manner in foggy weatner 
t()l| Arge bells, each weighing about twelve hundred, are 
II 15 jV day and night by the same machinery which moves 
^ ‘Shts. As these bells, in moderate weather, may be 
'Considerably beyond the limits of the rock, vessels, 
expedient, get . warning to put about, and are there- 
•tfT ^t'ented fi-om running on the rock in thick and hazy 
'bt^. ®r, a disaster to which ships might otlierwise be liable, 
•K**hstanding the erection of the light-house. 
Nh "^1 ®A^bl‘ 5 htnent consists of a principal light-keeper, 
i^oree assistants, two of whom are , constantly at the 
' 'Ouse, while the third is stationed at a tower erected at 
^°Ath, where he corresponds by signals with tlie light- 
at the rock. 
‘Cvb * stupendous undertaking is highly creditable to Mr. 
the engineer, and does honour to the age in 
"''th been produced. The lights were exhibited, 
A first time, on the 1 st of February, 1811., 
STONEHENGE. 
a j?®^®brated monument of antiquity stands in the middle 
area near the summit of a hill, six miles distant 
