St Andrews find may be oldest surviving wall chart of periodic table

Chart appears to date from 1885, and was found under lecture hall during clean-out

A crumbling roll of canvas-backed paper discovered underneath a lecture theatre in Scotland may be the world's oldest surviving periodic table chart, experts have said.

The chart was found during a clean-out at the University of St Andrews in 2014 and appears to date from 1885 - 16 years after the Russian chemist Dmitri Mendeleev published his method of showing the relationships between the elements in 1869.