Torricelli Mercury Barometer
Toricelli mercury barometers continuously measure the changes in air pressure
Description
Toricelli mercury barometers continuously measure the changes in air pressure. To estimate a forecasts, one has to set the index on the glass tube to the actual mercury level. The changes in the atmospheric air pressure and the amount of change make a reliable forecast possible. Measuring (LxDxH):18x4x108cm.