(3) _African or Gambia Kino._--This is derived from _Pterocarpus erinaceus_, a native of Tropical West Africa, from Senegambia to Angola. The juice exudes naturally from fissures in the bark, but more abundantly from incisions, and soon coagulates to a blood-red and very brittle mass, known to the Portuguese of Angola as _sangue del drago_ ("dragon's-blood"). It is practically undistinguishable from the officinal kind first described, but is not a regular article of commerce. (4) _Australian, Botany Bay, or Eucalyptus Kino._--Several species of _Eucalyptus_ afford astringent extracts, those from the "red," "white," or "flooded" gum (_E. rostrata_), the "blood-wood" (_E. corymbosa_), and _E. citriodora_, being quite suitable for replacing the officinal kind. It is chiefly obtained by woodcutters, being found in a viscid state in flattened cavities in the wood, and soon becoming inspissated, hard, and brittle. Minor quantities are procured in a liquid state by incising the bark of living trees, forming a treacly fluid yielding 35 per cent. of solid kino on evaporation. It is imported from Australia, but there are no statistics to show in what quantity. =Mimosa- or Wattle-bark.=--The bark of numerous species of _Acacia_, natives of Australia, contains considerable percentages of deep-red mimo-tannic acid, which forms a hard and heavy tannage if used strong, though soft upper-leathers may be tanned with it in weak liquors. The chief kinds are as follows:--The common wattle (_Acacia decurrens_), including its variety _A. mollissima_, is known also under the names of green, black, and feathery, but must not be confounded with the silver wattle (_A. dealbata_), though but doubtfully a distinct species. The bark is obtainable in vast abundance, and is much used by tanners. The trees are stripped in September and the 2 or 3 months following, and the bark, being allowed to dry, is then in a marketable condition. This tree, which grows in the uplands, affords a larger percentage of tannin than the silver wattle. Blackwood or lightwood (_A. melanoxylon_) yields tanners' bark, which, is inferior, however, to that from _A. decurrens_. The bark of _A. penninervis_ yields of tannic acid 17·9 per cent., and of gallic acid 3·8 per cent. The bark of the native hickory (_A. suppurosa_) yields of tannic acid 6·6 per cent., and of gallic acid 1·2 per cent. The bark of _A. saligna_, of South-Western Australia, is much used by tanners, as it contains nearly 30 per cent. of mimo-tannin. _A. harpophylla_, of South Queensland, furnishes a considerable share of the mercantile wattle-bark for tanning purposes. The bark of _A. lophantha_ contains only about 8 per cent. of tannin.