John Smeaton He pioneered the use of 'hydraulic lime' (a form of mortar that will set under water) and developed a technique involving dovetailed blocks of granite in the building of the lighthouse. His lighthouse remained in use until 1877 when the rock underlying the structure's foundations had begun to erode; it was dismantled and partially rebuilt at Plymouth Hoe where it is known as Smeaton's Tower. Deciding that he wanted to focus on the lucrative field of civil engineering, he commenced an extensive series of commissions, including: Smeaton is considered to be the first expert witness to appear in an English
Grønningen Lighthouse Grønningen Lighthouse Grønningen Lighthouse () is a coastal lighthouse in the municipality of Kristiansand in Vest-Agder county, Norway. The lighthouse sits on an islet in the Kristiansandsfjorden, and it marks the eastern side of the main shipping channel that leads inland to the port of the city of Kristiansand. The other lighthouse, which marks the western entrance, Oksøy Lighthouse, lies about to the west. The tall square concrete tower is white with a red roof. It is attached to one end of a 1-1/2 story lighthouse keeper's house. The light sits at an elevation of and it emits two white,