To borrow an expression from the language of metallurgic art, they were men "at the highest degree of hardness."
I cannot get over this hiatus—cannot imagine a metallurgic industry beginning with the use of alloys.
In fact the metallurgic industry occupies the second place after the mining industry which is the most centralized in France.
The mines of the Bulgar Dagh are an equally clear indication of their skill in mining and metallurgic work.
The metallurgic industries, favoured by the abundance of coal and iron, are concentrated round the mines.
These two facts show the advance made by them in the metallurgic art.