The most popular process of manufacturing fire among prehistoric peoples was the friction system. Mostly, a pointed hardwood was twirled between the palms and pressed into a gap on the edge of the softer wood. Flint, pyrites, and fire drills are actually present in Neolithic sites in Europe. The creation https://workplace-fire-risk-asses46678.p2blogs.com/35035796/workplace-fire-risk-assessment-things-to-know-before-you-buy