GENERAL KNOWLEDGE

Detailed explanation-1: -The first mercury filled glass tube was generally accepted to have been invented in 1643 by Torricelli, which became known as Torricelli’s mercury barometer. In this he produced a vacuum by filling a glass tube with mercury, inverting it and then submerging the open end in a vessel of mercury.

Detailed explanation-2: -He noticed that the height of the mercury in the tube changed in advance of variations in the weather. When the mercury level lowered, the weather turned poor. When the mercury rose, the weather became fair. This experiment created the first barometer.

Detailed explanation-3: -Evangelista Torricelli, (born Oct. 15, 1608, Faenza, Romagna-died Oct. 25, 1647, Florence), Italian physicist and mathematician who invented the barometer and whose work in geometry aided in the eventual development of integral calculus.

Detailed explanation-4: -Evangelista Torricelli was the inventor of the barometer. A barometer is a device which is used for the measurement of air pressure. The first barometer was made in the year 1644 in Florence, Italy.