More or Less - A guide to imperial measures - from barleycorn to Roman mile - ÃÛÑ¿´«Ã½ Sounds

More or Less - A guide to imperial measures - from barleycorn to Roman mile - ÃÛÑ¿´«Ã½ Sounds
A guide to imperial measures - from barleycorn to Roman mile
Tim Harford asks mathematician Matt Parker for his guide, starting with barleycorns.