Probably the most common process of producing fire amid prehistoric peoples was the friction system. Mostly, a pointed hardwood was twirled involving the palms and pressed right into a hole on the edge of a softer wood. Flint, pyrites, and fire drills have been located in Neolithic sites in Europe. https://zanderfexne.livebloggs.com/42753468/the-basic-principles-of-understanding-your-legal-duties-under-the-fire-safety-order