An aneroid barometer is an instrument for measuring pressure as a method that does not involve liquid.
He then took a four-foot-long glass tube that was open on one end, filled it with mercury, and turned it upside down with the open end beneath the surface of the mercury. His invention has many modern uses, but barometers are especially important for weather monitoring and prediction.
The objective of reaching the East Asian countries through a more direct route, famous for their spices and gold, did However, Berti and his friend Galileo Galilei erroneously believed that the atmosphere was weightless! He experimented with fountains in Florence and a long tube over ten metres (33 feet) high filled with water that was in his house. And surprisingly, it was amazingly similar to the mercury barometers in use today. It occurred to him that if the atmospheric pressure supported the mercury in the tube, as shown in Torricelli’s experiment, the height of the column of mercury in the tube should increase or decrease if the pressure increased or decreased.As the weight of mercury is about fourteen times greater than that of water, he reasoned that the heights of the two should be proportional to their weights.His apparatus, which was placed in an inverted position, consisted of a tube with a very smooth interior, into which a piston was closely fitted. This movement was transmitted to a series of levers terminating at a small post or pin to which an indicating hand was fitted.
(: The French scientist Lucien Vidie invented the aneroid barometer in 1843 by using a spring balance. Inspired by Galileo’s writings, he wrote a treatise on mechanics, De Motu (“Concerning Movement”), which impressed Galileo. Torricelli was a student (for a brief three months) of Galileo Galilei (1564–1642), and he was inspired by his mentor’s observation that piston pumps can only lift water up 33 feet (about 10 meters), after which point it is impossible to pump the water any higher. Several inventors invented a version of the thermoscope at the same time. Noting the tube as he returned he found at the lower levels of the mountain the mercury continued to rise until by the time he arrived in his garden at Clermont the mercury stood at its original level of 26 inches and 3% lines.Vidi subsequently made a case of different form. I hope you find an answer to your question, but if your don't then please send me your question via email, comment or via Google+ and I'll try and answer it.Interestingly, the Italian astronomer Gasparo Berti may have unintentionally built a barometer between 1640 and 1643.