In the beginning of the operation enough argentiferous lead is charged to fill the cavity of the test.
The table below gives the average production of zinc, argentiferous lead, iron-pyrites and other ores during the quinquennial period 1901f 905.
The leading products of the blast-furnace are argentiferous lead (base bullion), matte, slag and flue-dust (fine particles of charge and volatilized metal carried out of the furnace by the ascending gas current).
Formerly all argentiferous lead had to be cupelled, and the resulting litharge then reduced to metallic lead.
At the same time small bars of argentiferous lead, inserted at the back, are slowly pushed forward, so that in melting down they may replace the oxidized lead.