. Cyclopedia of farm crops. Farm produce; Agriculture. TANNING MATERIALS TANNING MATERIALS 62b outer bark. Other pine barks contain 2 to 7 per cent of tannin. Sitka spruce {Picea Sitchensis) is native along the coast from Alaska to northern California. The bark contains about 17 per cent of tannin. Norway spruce (Picea excelsa). The bark contains 7 to 13 per cent of catechol tannin and much fermentable sugar. It is used largely in Austria and is the source of the so-called larch bark extract. White spruce (P. alba), native in northern United States and Canada, is very similar. Silver fir (Abie
. Cyclopedia of farm crops. Farm produce; Agriculture. TANNING MATERIALS TANNING MATERIALS 62b outer bark. Other pine barks contain 2 to 7 per cent of tannin. Sitka spruce {Picea Sitchensis) is native along the coast from Alaska to northern California. The bark contains about 17 per cent of tannin. Norway spruce (Picea excelsa). The bark contains 7 to 13 per cent of catechol tannin and much fermentable sugar. It is used largely in Austria and is the source of the so-called larch bark extract. White spruce (P. alba), native in northern United States and Canada, is very similar. Silver fir (Abies pectinata) is used to a limited extent. The bark contains 6 to per cent of iron-bluing tannin. Lowland fir (Abies grandis) is native along the coast from Vancouver island to northern California, and inland to Idaho and Montana. The bark contains about 9 per cent of tannin. Larch (Larix Europcea) coTAaxas 9 to 10 per cent of a pale catechol tannin and is suitable for light leathers. Dwarf juniper (Juniperus communis) bark is used in Russia. Several members of the Taxaceae or yews are used in Australasia for tanning and contain 20 to 30 per cent of tannin. Redwood {Sequoia sempervirens) is native along the coast and thirty miles inland from southern Oregon to south of Punta Gorda, California. The wood contains about 2 per cent of tannin and the bark probably some- what more. Big tree (Sequoia gigantea) produces a gum which exudes from the tree and which may contain as high as 70 per cent of tannin. The oak tannins. Ckesnut oak (Quercus Prinus) is found from southern Maine to Maryland and in the mountains southward to northern Alabama and Georgia, and westward to Lake Erie and central Kentucky and Tennessee. Chestnut oak bark is next in importance to hemlock bark in this country, and contains 8 to 14 per cent of tannin, probably both catechol and pyrogallol. The wood contains 2 to 5 per cent of tannin. An extract is also made from the bark. It is customary to cut all trees w
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectagriculture, bookyear
