Harrington is very interested in the idea of toilets in this book. The toilet has no main sewer, no running water and no money to pay for the installation of pipes. It is practical for most people. Most people still clean empty toilets or let night dung workers clean dirt.
Joseph Brame, a British inventor, improved the design of the toilet in the18th century, and adopted some components, such as a three-ball valve, to control the water flow in the water tank, and to ensure that the smell of the sewage pipe would make the user connect with the U-bend. 1778, he obtained a patent for toilet.
By the19th century, most European cities and towns had installed water pipe sewage systems, and most people used toilets. Right: The important feature of the toilet is that there is always some water left in the S-shaped pipe or sewer trap, which is equivalent to the smell of the gasket.
Even a big city like London (19) only provided drainage facilities in the 1960s, when many people first enjoyed the benefits of toilets, more than 300 years after Harrington invented it.