_Eucalyptus longifolia_ bark, the "woolly-butt" of Australia, contains 8·3 per cent. of tannic acid, and 2·8 of gallic. The "peppermint"-tree contains 20 per cent. of tannic acid in its bark. The "stringy-bark" (_E. obliqua_) gives 13-1/2 per cent. of kinotannic acid. The Victorian "iron-bark" (_E. leucoxylon_) contains 22 per cent. of kinotannic acid, but is available only for inferior leather. _Eugenia Maire_ bark, the _whawhako_ of New Zealand, contains 16-17 per cent. of tannin. _E. Smithii_ bark, the "myrtle"-tree of Australia, contains 17 per cent. of tannic acid and 3-4 of gallic. _Fuchsia macrostemma_ root-bark is thin, brittle, and easily exhausted; it contains about 25 per cent. of a bright-red tannin, which has been successfully tried. It is the _churco_ bark of Chili, which, however, is attributed by the Kew authorities to _Oxalis gigantea_. _Inga Feuillei_ pods, the _pay-pay_ of Peru, contain 24 per cent. of an almost colourless tannin. _Laurus Peumo_ rind is used in Chili for tanning uppers. _Malpighia punicifolia_ bark, the _naucite_, or _manquitta_ bark of Nicaragua, contains 20-30 per cent. of a very light-coloured tannin. _Persea Lingue_ bark is red-brown, soft, and easily exhausted by water; it contains 20-24 per cent. of tannin, and much slimy matter which promotes the swelling of the hides. It serves in South America, especially in the Chilian province of Valdivia, for tanning Valdivia leather. In Southern Chili are enormous forests of the tree. The imported bark has given good results with heavy leathers. _Phyllocladus tricomanoides_ bark, the _kiri-toa-toa_ of New Zealand, contains 23 per cent. of tannin. _Polygonum amphibium_ leaves, an annual plant abundant in the Missouri Valley, contain 18 per cent. of tannin, and can be mown and stacked like hay. It is largely used in Chicago tanneries, and said to give a leather which is tougher, more durable, of finer texture, and capable of higher polish, than that tanned with oak-bark. _Punica Granatum_ fruit-rind, the pomegranate, contains about 13·6 per cent. of a tannin like myrobalans, and a considerable quantity of starch; the tannin is greatest in the bitter kind, which is used for preparing morocco leather; the root-bark also is rich in tannin. _Rhizophora Mangle_ bark, the mangrove, of Venezuela, contains 24-30 per cent. of deep-red tannin, if obtained from young stems; samples from the West Indies have given 11·94 per cent., probably by the gelatine process; two samples from Shanghai, by Löwenthal's improved method, gave respectively 9·8 and 9·5 per cent. calculated as oak tannin, and 71·96 and 78·52 of woody fibre. Guayaquil exported 9328 cwt. of the bark to Peru in 1879. _Tecoma pentaphylla_ bark, the _roble colorado_ of Venezuela, contains 27 per cent. of tannin, accompanied by a soluble orange-red colouring matter. _Wagatea spicata_ pods contain 15 per cent. of tannic acid. The plant, a scrambling shrub, is a native of the Concans.