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
Grytøy Lighthouse keeper's house. It was located near the current lighthouse. That lighthouse was closed and demolished in 1959 and replaced with an automated light tower nearby. Grytøy Lighthouse Grytøy Lighthouse () is a coastal lighthouse in Bodø Municipality in Nordland county, Norway. It is located in the Vestfjorden in the Helligvær islands, about northwest of the town of Bodø. The current light sits atop a tall concrete tower. The light sits above sea level. It has two flashes every 10 seconds, the color that flashes is white or red depending on direction from which it is seen. The light can be