Esempi
The king left him as sub regulus whenever he was out of the country.
This was smelted, which reduced the bulky and heavy copper ore to a much smaller and more valuable regulus , before transporting it to the English and Australian Copper Smelting Company at Port Adelaide or to England.
He also bought the nearby smelting works at Scotts Creek to refine copper regulus produced at the Bremer mine.
When it demolished the furnace in 1882 it recovered also some copper from stockpiled regulus .
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