Black bears have occasionally very black coats, but the majority have a brownish underwool.
It is Venetian in character, of a brownish tint, with two white enamel rings round the body.
Her plumage, with exception of the wings and tail, which are of a dull red, is light-olive above and brownish-yellow beneath.
It is a brownish amorphous solid, which is insoluble in water.
If the substance does not melt but changes colour, we may have present: zinc oxide - from white to yellow, becoming white on cooling; stannic oxide - white to yellowish brown, dirty white on cooling; lead oxide - from white or yellowish-red to brownish-red, yellow on cooling; bismuth oxide - from white or pale yellow to orange-yellow or reddish-brown, pale yellow on cooling; manganese oxide - from white or yellowish white to dark brown, remaining dark brown on cooling (if it changes on cooling to a bright reddishbrown, it indicates cadmium oxide); copper oxide - from bright blue or green to black; ferrous oxide - from greyish-white to black; ferric oxide - from brownish-red to black, brownish-red on cooling; potassium chromate - yellow to dark orange, fusing at a red heat.