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Whether he used a plumbiferous, or lead glaze; or a stanniferous, or tin glaze, we do not know.

As with borax, but a larger addition of oxide, required to produce a yellow color in the warm bead. in the reducing flame.The plumbiferous glass spreads out on charcoal, becomes turbid, bubbles up, until the whole of the oxide is reduced, when it again becomes clear.

On charcoal the plumbiferous glass becomes grey and dull.

It seems surprising that the nearest neighbors of the Phœnicians--the Greeks, the Egyptians, the Etruscans, and the Romans--should have manufactured plumbiferous bronzes, while the Phœnicians carried to the people of the North only pure bronzes without the alloy of lead.