A short encyclopedia entry describing asbestos as a native stone that splits into fine, silky threads one to ten inches long and survives fire, which only whitens it. It notes that cloth and paper have been made from it, reports Royal Society trials in which asbestos cloth lost a dram of weight in the fire, and repeats Pliny's account of napkins cleaned by burning. It names localities in Asia and Europe, including Anglesey in Wales and Aberdeenshire in Scotland.