--+--------------------------------------+-------------------------------- 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 _ | Baryta | Baryta \ | Strontia | Strontia \ | Lime | Lime | | Magnesia | Magnesia |With | Glucina | Glucina |intermittent | Yttria | Yttria }flame | Zirconia | Zirconia |opaque-white. | Thoria | Thoria only when | | | saturated | | Oxide of Lanthanum | Oxide of Lanthanum | | " " Cerium | " " Cerium / | Tantalic Acid | Tantalic Acid _/ | Oxide of Didymium | Oxide of Didymium | " " Manganese | " " Manganese | _ | _ | Niobic Acid \ In small | Niobic Acid \ In small | Pelopic " } proportions. | Pelopic " } proportions. | _/ | _/ | _ | _ | Oxide of Silver \ | Oxide of Silver \ After | " " Zinc \ After long | " " Zinc \ long | " " Cadmium | continued | " " Cadmium | continued | " " Lead } blowing. | " " Lead } blowing. | " " Bismuth | Otherwise | " " Bismuth | Otherwise | " " Antimony| grey. | " " Antimony | grey. | " " Nickel / | " " Nickel / | Telluric Acid _/ | Telluric Acid _/ --+--------------------------------------+-------------------------------- Yellow to brown. --+--------------------------------------+-------------------------------- | Titanic Acid | Titanic Acid. | Tungstic " | Tungstic " | Molybdic " | Molybdic " | Vanadic " | --+--------------------------------------+-------------------------------- Blue.