Show spongy chromium chromium in a remarkably new spongy form has been produced by 1 net de Jasson lex by heating cast chro alum containing 15 per cent of boron in an electric furnace with a large mass 0 copper the ingot shows the white spongy metal in the midst ol 01 the copper when the latter Is dis solved out the dried residue Is a bril hant spongy mass of nearly pure chromium in the form of interlaced ali aments or crystallites tes grouped like snowflakes or moss leaves the small amount of boron present may be daiv en oft by heating iho spongy chro gium is attacked more easily than the ordinary metal does not oxidize in air but in flamo burns like tinder glows very brightly in boygen and Is attacked by hydrochloric and sulphur ac acid but not by nitric acid |