Instruments
Many instruments have been invented to measure pressure, with different advantages and disadvantages. Pressure range, sensitivity, dynamic response and cost all vary by several orders of magnitude from one instrument design to the next. The oldest type is the liquid column (a vertical tube filled with mercury) manometer invented by Evangelista Torricelli in 1643. The U-Tube was invented by Christian Huygens in 1661.
Read more about this topic: Pressure Measurement
Famous quotes containing the word instruments:
“I rejoice that America has resisted. Three millions of people, so dead to all the feelings of liberty, as voluntarily to submit to be slaves, would have been fit instruments to make slaves of the rest.”
—William Pitt, The Elder, Lord Chatham (1708–1778)
“Fashionable women regard themselves, and are regarded by men, as pretty toys or as mere instruments of pleasure; and the vacuity of mind, the heartlessness, the frivolity which is the necessary result of this false and debasing estimate of women, can only be fully understood by those who have mingled in the folly and wickedness of fashionable life ...”
—Sarah M. Grimke (1792–1873)
“The form of act or thought mattered nothing. The hymns of David, the plays of Shakespeare, the metaphysics of Descartes, the crimes of Borgia, the virtues of Antonine, the atheism of yesterday and the materialism of to-day, were all emanation of divine thought, doing their appointed work. It was the duty of the church to deal with them all, not as though they existed through a power hostile to the deity, but as instruments of the deity to work out his unrevealed ends.”
—Henry Brooks Adams (1838–1918)