The filaments from which stuffs of all kinds are fabricated, are derived either from the animal or the vegetable kingdom. We recognise the former by the property they possess of liberating ammonia on being treated with potash; while the latter afford a liquor having no acid reaction under the same treatment. The animal kingdom furnishes three varieties - silk, wool, and the furs, etc, of various animals; the vegetable kingdom also three - flax, hemp, and cotton: all of which require certain preliminary preparations to render them fit for the dyer, which do not come within our province, our space only admitting of a rapid glance at the production of the various colours.