92 BERMUDA. 



with a lighthouse and a telegraphic post on its 

 summit. To the westward, and contiguous to it, is 

 a table-land, crowned with a grove of dark, tall 

 cedars.* 



Between Gibbs' Hill and Castle Island, to the 



* The lighthouse was erected on Gibbs' Hill in the year 

 1845. It is of iron, and was constructed in London, at a cost of 

 5,500?., which was borne by the home Government. The light 

 was first exhibited on the 1st of May, 1846. It is a revolving 

 light, on what is called the catadioptric principle, having a lamp 

 of three concentric wicks, and is somewhat similar to one erected 

 on the Isle of May in the Firth of Forth in Scotland. The light 

 is 125 feet above the base, which is 245 feet above the sea ; the 

 total height of the column to the top of the nave is 133| feet. 

 The flash of the light is of extreme brilliancy, continuing for six 

 or eight seconds : the interval between the flashes is about sixty- 

 two or sixty-three seconds. The distances from which the light 

 can be seen at diflerent elevations are as follows : — 



Correct Distances in 

 Nautical Miles. English Miles. 



Refraction allowed for. 



The horizon is intercepted to an observer at the light by two 

 hills, one intercepting an arc — 



From N. 43° 24' E. true, or N. 50° 24' magnetic, 

 To N. 47° 34' E. true, or N. 54° 34' magnetic j 



and the other hill, an arc — 



From N, 49° 7' E. true, or N. 55° 7' magnetic, 

 To N. 57° 35' B. true, or N. 64° 35' magnetic. 



With these exceptions the light is visible all round the circle. 



The latitude of the light is 32° 15' 4" N. j long. 64° 51' 36" W. 



