Natural Tanning Materials
1. Barks.—Oak, Hemlock, Pine, Fir, Alder, Khaki, Willow, Cork, Mimosa or Wattle, Babool, Larch, Mangrove, Spruce, Elm, Birch, Pomegranate, Cebil.
2. Leaves, Twigs, etc.—Sumach, Mangrove, Mango, Eucalyptus, Pistacia, Lentiscus.
3. Roots.—Canaigre, Palmetto.
4. Fruits.—Myrobalans, Valonia, Divi-Divi, Cascalote, Mangosteen, Pomegranate, Celavinia, Bablah, Algarobilla.
5. Excrescences.—Gall Nuts, Chinese Galls, Pistacia Galls, Tamarisk Galls.