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