Antique Barometer Thermometer Torricelli, Ateliers Altitude Montreau, first half of the 20th century

Antique Barometer Thermometer Torricelli, Ateliers Altitude Montreau, first half of the 20th century. Splendid and antique Torricelli Barometer, Atelier Altitude à Morteau. The barometer must remain upright because it contains mercury. For calibration, adjust according to your altitude. Measure: H 102 x L 16 cm The Torricelli tube or Torricelli barometer, named after its inventor, Evangelista Torricelli (1608-1647), was the first measuring instrument specially designed to measure atmospheric pressure. It consists of a glass tube closed on one side and open on the other, with a section of one square centimeter (the section of the tube does not matter, as long as it is not a capillary and there is enough liquid to fill the tube to the appropriate height) one meter long, filled with mercury, placed in a tray, also containing mercury, so as to create a system of communicating vessels. The choice of this element is given by its high density, which allows you to work at high pressures with relatively small volumes. 
Measures H x L x P 102 x 16 x