Flag of Guernsey cross by Pope Alexander II and flew it on his standard in the Battle of Hastings. Since 2000, a red ensign with the cross in the fly has been used as the government's civil ensign and as a blue ensign. Prior to 1985, Guernsey had no official unique flag and instead used the St George's Cross (the flag of England) as its flag when one was officially required. This came about after King Edward VIII granted consent for Guernsey to use the flag of England in 1936; during the German occupation of the Channel Islands, the residents were prevented from
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