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A dowser, from an 18th-century French book about superstitions. Dowsing is a type of divination employed in attempts to locate ground water, buried metals or ores, gemstones, oil, claimed radiations (radiesthesia), [1] gravesites, [2] malign "earth vibrations" [3] and many other objects and materials without the use of a scientific apparatus.
The Aztec also used the dam to control the level of water in the lake and prevent their city from being flooded during times of heavy rains. To prevent flooding, the Aztec constructed an inner system of channels that helped to control the water level and held the level steady during flooding and periods of intense rains.
Don Luís de Velasco (fl. 1561-1571 Early Modern Spanish: [doŋ ˈlwis d̪e beˈlasko]), also known as Paquiquino (or Paquiquineo), and also simply Don Luis, was a Native American, possibly of the Kiskiack or Paspahegh [1] people, from the area of what is now Tidewater, Virginia. In 1561 he was taken by a Spanish expedition.
Real de a 8, also known as "Spanish American peso", "Spanish dollar" or "piece of eight", considered to be the first world currency, which also gave the origin of the dollar or peso sign ($), was a Spanish/Mexican invention, it was first used in New Spain before being widely used in the whole Americas, parts of Europe and the Far East.
Abu al-Qasim al-Zahrawi (936–1013 AD), better known in the west as Albucasis, is regarded as the father of modern surgery and is the most quoted surgeon of all times. Albucasis invented over 200 tools for use in surgery - many still in use today. Water and weight driven mechanical clocks, by Spanish Muslim engineers sometime between 900 ...
A map of the pre-historic cultures of the American Southwest ca 1200 CE. Several Hohokam settlements are shown. The agricultural practices of the Native Americans inhabiting the American Southwest, which includes the states of Arizona and New Mexico plus portions of surrounding states and neighboring Mexico, are influenced by the low levels of precipitation in the region.
Jerónimo de Ayanz y Beaumont (1553–1613), registered a design for a steam-powered water pump for use in mines. [5] José Luis Ayuso Fernández (1897-1992), inventor, engineer, mechanic, electrician and cinematographic projectionist. He was a pioneer in sound film industry, inventing one of the first systems to synchronize sound and video in ...
Permanent water chlorination began in 1905, when a faulty slow sand filter and a contaminated water supply led to a serious typhoid fever epidemic in Lincoln, England. [129] Dr. Alexander Cruickshank Houston used chlorination of the water to stem the epidemic. His installation fed a concentrated solution of chloride of lime to the water being ...