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Tarmacadam is a concrete road surfacing material made by combining tar and macadam (crushed stone and sand), patented by Welsh inventor Edgar Purnell Hooley in 1902. It is a more durable and dust-free enhancement of simple compacted stone macadam surfaces invented by Scottish engineer John Loudon McAdam in the early 19th century.
John Loudon McAdam, 1830, National Gallery, London. John Loudon McAdam (23 September 1756 [1] – 26 November 1836) was a Scottish civil engineer and road-builder. He invented a new process, "macadamisation", for building roads with a smooth hard surface, using controlled materials of mixed particle size and predetermined structure, that would be more durable and less muddy than soil-based tracks.
Miners struck a gushing spring of natural bitumen, a black treacle-like substance, when digging a canal tunnel for the Coalport Canal in 1787, [1] or else digging a level in search of coal. [2] [3] The plan, proposed by William Reynolds, was to connect the canal alongside the River Severn to the lower galleries of the mines below the Blists ...
Coal-mining was also one of the many dangerous jobs that employed child workers. Children were perfect for squeezing into tight spaces in mines that adults could never reach.
New macadam road construction at McRoberts, Kentucky: pouring tar. 1926 With the advent of motor vehicles , dust became a serious problem on macadam roads. The area of low air pressure created under fast-moving vehicles sucked dust from the road surface, creating dust clouds and a gradual unraveling of the road material. [ 18 ]
Pit brow women or pit brow lasses were female surface labourers at British collieries. They worked at the coal screens on the pit bank (or brow) at the shaft top until the 1960s. Their job was to pick stones from the coal after it was hauled to the surface. More women were employed in this capacity on the Lancashire Coalfield than in any other ...
During that time, Diana had 3 children - Lori, born in 1966, Scott, who lived 1968 – 2022, and Mark, born in 1970. Later she married James Roger Gibbs (m. 1982 – 1991). Baldwin moved to South Carolina in 1992 where she received her Commercial driver's license and became an on-the-road truck driver. She met William Christian, a truck driver ...
Coal tar causes increased sensitivity to sunlight, [55] so skin treated with topical coal tar preparations should be protected from sunlight. The residue from the distillation of high-temperature coal tar, primarily a complex mixture of three or more membered condensed ring aromatic hydrocarbons , was listed on 13 January 2010 as a substance of ...