cobs (kob)

[=LG. kob be = Fries. kub, a seamew.] The great black-backed gull, Larus ma rin us. Also spelled cobb. [Eng.] 1072 cobelligerent Bohemia, He e, and Norway. The principal value of co balt in the arts is due to the fact that protoxid furnishes an intense and beautiful blue color, of importance in painting, and especially in the decoration of porcelain and gla . (See smalt and zaffre.) Also spelled kobalt. Cobalt blue. See blue. - Cobalt green. See green, — Cobalt plating, a method of electroplating by the use of a bath of neutral solution of cobalt and ammonium double sulphate, or cobalt sulphate with ammonium or magnesium sulphate, or cobalt chlorid combined with ammonium and magnesium chlorids. See electroplating. Cobalt yellow. See yellow. - Earthy cobalt. See asbolan.-Gla of cobalt, or cobalt gla , a cobalt silicate prepared by fusing cobalt-glance or spei -cobalt, previously roasted, with sand and potash. When pulverized finely it is called smalt, and is used as a pigment.