History of the Jews in Guernsey in Guernsey when the islands were occupied. In addition, a few locals decided to remain in Guernsey rather than evacuate in June 1940. During the occupation of the Channel Islands by Nazi Germany during World War II, laws were imposed on the authorities that required registration. All non Guernsey and British foreigners (aliens) had already been required to register with the police, but the records did not mention their faith. An advertisement appeared in the newspaper in October 1941 calling on all Jews to identify themselves. The Germans issued identity cards to everyone, which listed their nationality and faith. Jews
History of water supply and sanitation was invented by Alexander Cummings in 1775 but became known as the U-bend following the introduction of the U-shaped trap by Thomas Crapper in 1880. The first screw-down water tap was patented in 1845 by Guest and Chrimes, a brass foundry in Rotherham. Founders of microscopy, Antonie van Leeuwenhoek and Robert Hooke, used the newly invented microscope to observe for the first time small material particles that were suspended in the water, laying the groundwork for the future understanding of waterborne pathogens and waterborne diseases. Sir Francis Bacon attempted to desalinate sea water by passing the flow through a sand