Encyclopedia entry on hats from Knight's American Mechanical Dictionary, covering the history of hats from antiquity (Greek, Persian, Roman forms, the Phrygian cap, the petasus) through the introduction of felt hats in medieval Europe. It describes hand and machine methods of making felt and fur hat bodies, including bowing, basoning, planking, the Wells perforated cone, and the finishing of silk plush hats. It also lists the parts of a hat, kinds of hats, and the preparation and plaiting of Panama straw, with illustrations of ancient hats, a hat diagram and a hat-blocking machine.