The best Side 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 freeing the ore from the rock, and mine-boys or carusi carrying baskets of ore into the surface area, usually by way of a mile or