when did lead start being used in paint
Lead paint Lead white was being produced during the 4th century BC; the process is described by Pliny the Elder, Vitruvius and the ancient Greek author Theophrastus.
Limit of a function (the Dirichlet function) has no limit at any x-coordinate.
Vehicle identification number VINs were first used in 1954.[1] From 1954 to 1981, there was no accepted standard for these numbers, so different manufacturers used different formats.
Classic car Cars 20 years and older typically fall into the classic class.