THE SOUTH DEVON 



MONTHLY MUSEUM. 



PLYMOUTH, MARCH 1, 1833. 



No. 3.] PRICE SIXPENCE. [VOL. I. 



SOME PARTICULARS OF THE CONSTRUC- 

 TION OF THE EDDYSTONE LIGHTHOUSE. 



Concluded from Page 46. 



IN laying the stone, a certain number of men were 

 employed beating up the cement in buckets ; while the 

 stone was raised over its place. When ready, the ce- 

 ment was spread upon the bed of the stone, which was 

 immediately lowered into its place, and the liquid 

 mortar above mentioned poured into the chink round 

 its sides. Two wedges were then prepared, each three 

 inches wide and one thick at the thick end, correspond- 

 ing with the groove in the side of the stone. One of 

 these wedges was then placed butt end downwards in 

 the groove, and the other driven by it edge foremost ; 

 thus jamming the stones together. This being done 

 to each groove, a man with a jumper continued the holes 

 bored through the stone, for some inches into the rock 

 beneath. An oaken wedge being then placed, butt 

 end downward, at the bottom of the hole ; an oaken 

 trenail, two feet long and two inches wide was put in 

 upon it, and being driven down, the wedge entered the 

 trenail notched for the purpose and jammed it tight 

 into the bed of the stone. The trenail being then cut 

 off fair with the upper surface, was jammed by cross 

 wedges into the stone itself; and Mr. Smeaton says, 

 that if it had been necessary to get out these trenails, 

 they must have been bored out, as no force could have 

 drawn them either upward or downward. The stones 

 VOL. i. 1833. L 



