Smeaton's Tower stood were becoming eroded. Each time a large wave hit, the lighthouse shook from side to side. Smeaton's Tower ceased operation in 1879 with the illumination of Douglass's Tower on an adjacent rock. In 1882 the upper part of Smeaton's Tower was dismantled and rebuilt as a memorial to Smeaton on a new base on Plymouth Hoe, replacing the triangular obelisk that had been built there by Trinity House as a navigation aid in the early 19th century. It was opened to the public by the Mayor of Plymouth on 24 September 1884. The foundation and stub of the old
Culture of the United Kingdom Scottish road builder John McAdam invented "macadamisation" for building roads with a smooth hard surface. In 1901, Edgar Purnell Hooley added tar to the mix and named it Tarmac (short for tarmacadam). Probably the greatest driver behind the modern use of concrete was Smeaton's Tower built by John Smeaton in the 1750s. The third Eddystone Lighthouse (the world's first open ocean lighthouse), Smeaton pioneered the use of hydraulic lime in concrete. Scotsman Robert Stevenson constructed the Bell Rock Lighthouse in the early 1800s. Situated 11 miles off east Scotland, it is the world's oldest surviving sea-washed lighthouse. Portland cement, the