The 'Bullion Act' was passed and an Assay office was established in Adelaide for the assaying and stamping of gold in 1852.
Everett Joel Hall (1879-1931) was a professor of assaying at Columbia University and founded the Metals Disintegrating Company to produce metal powders such as aluminium powder.
In 1920, he co-developed with Hsien Wu the Folin-Wu method of assaying glucose in protein-free filtrates of blood.