Thread: SumAluminum

Very nice indeed, really like the details obtained on these scales, thanks for sharing!
Aluminum was very expensive and once considered a precious metal.
In 1852 one Kilogram was $1200.
A french chemist, Henri Étienne Sainte-Claire Deville, found a new way to extract the metal and the price dropped to $40 for one kilogram.
Then on April 2, 1889, Charles Martin Hall patented an inexpensive method for the production of aluminum, which brought the metal into wide commercial use. By 1914, Charles Martin Hall had brought the cost of aluminum down to 18 cents a pound and it was no longer considered a precious metal.