An Unbiased View of zinc sulfide
: Adjectis synonymis et veteribus et recentioribus ac novissimarum analysium chemicarum summis. Systematis mineralium naturalis prodromus. OCLC 995480390. ^ a bMining was unmechanized and labor-intense, with pickmen liberating the ore in the rock, and mine-boys or carusi carrying baskets of ore on the surface, typically through a mile or maybe m