Note 35 — PART V LIME-ROASTING OF GALENA (continued 2)
Reading edition
Percentages of lead in Missouri practice are based on the wet assay; among the silver-lead smelters of the West the fire assay is still generally employed.
Reading edition
Percentages of lead in Missouri practice are based on the wet assay; among the silver-lead smelters of the West the fire assay is still generally employed.