This may be the wold's oldest known classroom chart of the Periodic Table of the Elements.
This is a big year for the Periodic Table of the Elements as the world celebrates the 150th anniversary of Dmitri Mendeleev's creation. We can now lays eyes on a fascinating relic of its history. The University of St. Andrews in Scotland says it found and restored the world's oldest periodic table chart.
St - Andrews - Find - Thursday - Chemist
St. Andrews detailed the find on Thursday, though chemist Alan Aitken uncovered the chart among a collection of old chemicals and lab gear in 2014 while cleaning out a storage area in the university's School of Chemistry. The chart was big and fragile and started to flake when handled.
The university says the chart is similar to a second version of the table Mendeleev produced in 1871. A printer's...