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LIST OF SCIENTIFIC INSTRUMENTS AND THEIR USES Scientific Insruments Uses Inventors Altimeter An instrument used in aircrafts for measuring altitudes French physicist Louis Paul Cailletet Ammeter Measures electric current Friedrich Drexler Anemometer Used to measure the speed, direction and pressure of the wind. Leon Battista Alberti Audiometer Measures intensity of sound Georg von Békésy (1899-1972; winner of the Nobel Prize), a Hungarian-American physicist. Barograph Continuous recording of atmospheric pressure Frenchman Lucien Vidi Barometer Measures atmospheric pressure and conditions. Evangelista Torricelli Binoculars An optical instrument used for magnified view of distant objects. J. P. Lemiere Bolometer Measures infra-red (Heat) radiation. Samuel Pierpont Langley Callipers Measures diameters of thin cylinder/wire. Pierre Vernier Calorimeter Measures quantity of heat Antoine Lavoisier and Pierre-Simon Carburettor Used for charging air with petrol vapours in an intern...