For reference, in 1852(before the Héroult/Hall process), aluminium
sold for upwards of $1,200 per kilo.
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For this reason, the process(which is still used today)
is referred to as the Héroult/Hall process in honor of both of them.
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The discovery was made by Paul Lois Toussaint Héroult and Charles Martin Hall at almost the same
time in both France and America, totally independent from one another.