-------------------------------------------------------------------------- Color of Bead. --+----------------------------------------------------------------------- | Substances which produce this color +--------------------------------------+-------------------------------- | in the hot bead. | in the cold bead. --+--------------------------------------+-------------------------------- Colorless -----------------------------------------+-------------------------------- | Silica \ | Silica | Alumina \ | Alumina _ | Oxide of Tin | | Oxide of Tin \ | Telluric Acid | | Telluric Acid \ | Baryta | | Baryta \ | Strontia | | Strontia | | Lime | | Lime | | Magnesia | | Magnesia | | Glucina | In all | Glucina | | Yttria } proportions. | Yttria | | Zirconia | | Zirconia | | Thoria | | Thoria |With | Oxide of Lanthanum | | Oxide of Lanthanum |intermittent | | | " " Silver }flame | Tantalic Acid | | Tantalic Acid |opaque | Niobic " | | Niobic " |white. | Pelopic " / | Pelopic " | | Titanic " _/ | Titanic " | | _ | | | Tungstic " \ In small | Tungstic " | | Molybdic " \ quantity | Molybdic " | | Oxide of Zinc | only. | Oxide of Zinc / | " " Cadmium } | " " Cadmium_/ | " " Lead | In large | " " Lead | " " Bismuth / quantity | " " Bismuth | " " Antimony / yellow. | " " Antimony --+-----------+--------------------------+-------------------------------- Yellow, orange-red and reddish-brown. --+-----------+--------------------------+-------------------------------- | _ | | Titanic Acid, yellow \ | | Tungstic Acid, yellow \ | | Molybdic Acid, dark yellow|when in | | Oxide of Zinc, pale-yellow|large | | Oxide of Cadmium, }quantity. | | pale-yellow |Otherwise | | Oxide of Lead, yellow |colorless.| | Oxide of Bismuth, orange / | | Oxide of Antimony, yellow/ | | Oxide of Cerium, red | Oxide of Cerium with interm. | Oxide of Iron, dark red | flame opaque white. | Oxide of Uranium, red | Oxide of Iron, yellow