Theyd have mixed their ores and done the Dutchmens trick; but as soon as that pays and the excise wakes up, pff!
But the greater mass of the ores we melt have a far less produce than this.
The same property makes it so available in extracting these precious metals from their ores.
For this purpose they compete with the ores of Spain and Cuba.
These ores always contain impurities, such as silica, sulphides, and earthy materials.
Some ores smelt and flow so easily that a flux is not required.
With ores generally, the yield may be from 80 to 90 per cent.
In Brazil, the ores have undergone close folding and anamorphism.
It is very often associated with other ores, particularly the great ore of lead (galena).
The ores have a high content of cobalt and also carry precious metals.
12c., merger of Old English ora "ore, unworked metal" (related to ear "earth," cognate with Low German ur "iron-containing ore," Dutch oer, Old Norse aurr "gravel"); and Old English ar "brass, copper, bronze," from Proto-Germanic *ajiz- (cf. Old Norse eir "brass, copper," German ehern "brazen," Gothic aiz "bronze"), from PIE *aus- "gold" (see aureate). The two words were not fully assimilated till 17c.; what emerged has the form of ar but the meaning of ora.