[862] Op. cit.
[863] Hoppe-Seyler, Handbuch der physiologisch. Analyse, p. 415.
In the kidneys and livers of the ruminants copper may always be found, a sheep’s liver containing about 1 part in 20,000.[864] Church found copper in the feathers of the wings of the turaco; melopsitt in the feathers of a parroquet (Melopsittacus undulatus).[865] In these cases the copper enters into the composition of the colouring matter to which the name of “turacin” has been given. Turacin contains 7 per cent. of copper, and gives to analysis numbers which agree with the formula of C82H81Cu2N9O32.
[864] Dupré, op. cit.
[865] Chem. News, xxviij. 212.
Copper has been discovered in aërated waters, its presence being due to the use of copper cylinders, the tin lining of which had been rendered defective by corrosion.[866]