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-intensive, with pickmen liberating the ore with the rock, and mine-boys or carusi carrying baskets of ore to the surface, typically by way of a mile or e