Adam Rouilly Hygiene & Sanitation Chart from the New World Series dated 1957. This superb canvas backed chart shows Domestic HOT Water Supply. Measures 126 x 82cms inc. poles. This chart shows amazing detail and would have been an excellent teaching aid back in the days before You Tube. It is showing signs of age, some old water marks at the bottom and a couple of pen notes in 2 places where plumbing updates were introduced. I can just see this framed in a bathroom or plumbers showroom.