A short encyclopedia entry defining 'filament' in natural history as a fibre or fine thread found in flesh, nerves, skin, plants and roots. It describes how putrefaction or alkaline lye isolates the tough filaments, and notes the use of vegetable filaments in manufacturing: hemp, flax and cotton cloths in Britain, bark cloth and cordage in Madagascar, nettle fibre in France, hop stalk cloth in Sweden, and bark cloth in Otaheite (Tahiti).