An Unbiased View of infrared 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 within the rock, and mine-boys or carusi carrying baskets of ore towards the surface area, typically via a mil