The first large-scale water purification plant was created in 1804 in Scotland by John Gibb, a bleachery owner in Paisley. This water filter was the first documented example to have used sand filters as a water purification method.Know More
Water purification and filtering trace their history back to ancient India and Egypt. Images depicting water treatment are visible in Egyptian tombs dating back to between the 15th and 13th centuries B.C.
In 1903, water treatment devices began using sodium ions that function as water softeners. The water softeners worked by means of a system of ion exchange, in which harmful ions are replaced by harmless ions.Learn More
Although it is unknown precisely who invented the abacus, the device was developed in China around 3000 B.C. It is highly compact and easy to use and forms the basis for modern calculators and computers.Full Answer >
The United States Patent Office issued patent #174,465 to Alexander Graham Bell on March 7, 1876, for his device that could transmit speech electrically: the telephone. On March 10, Mr. Bell spoke the first intelligible words into the device: "Mr. Watson, come here, I want to see you."Full Answer >
The modern calendar was created by Pope Gregory XIII in 1582. He introduced the calendar as an adaptation of the Julian version because the drift of Easter, which was tied to the spring equinox, was considered undesirable by the Roman Catholic Church.Full Answer >
The electric drip coffee maker was invented in 1954 by the German inventor Gottlob Widmann, and the device was called the Wigomat. Electric coffee makers did not become popular in the United States until the 1970s.Full Answer >