Engraving from the catalogue of Thomas Crapper and Company. Both of the bidets shown are made of porcelain. The bidet shown above is also shown as a cros-section to reveal the way in which it works. Thomas Crapper (1837-1910) started a plumbing busines in Chelsea, London in 1861, and pioneered some of the most revolutionary designs of sanitary engineering in the 19th century, particularly in developing the modern WC cistern.
© Science Museum / Science & Society Picture Library