The catastrophic Tragedy of Aberfan occurred in South Wales killing many who were in a local school, mostly children.
A coal waste pile up created by the National Coal Board overflowed at the top of the village of Aberfan. The overflow flooded a junior school and surrounding buildings, killing 116 children and 28 adults.
English chemist John Dalton read his first atomic theory paper to the Manchester Literary and Philosophical society.
Dalton's paper was called "On the Absorption of Gases by Water and other Liquids," and it contained Dalton's Law. It's also known as Dalton's law of partial pressures, and is used to prove that the total pressure given out from a mixture of non-reacting gases, is the same as the partial pressures of the individual gases in the mixture. Meaning that the mixture doesn't increase exerted pressure.
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