Demos by PIRA
2B20 Static Pressure
2B20.40Interconnected set of glass vases of different shapes.
2B20.42Pascal's vases: Water in removable vases with pressure gauge.
2B20.60Hydraulic jack with pressure gauge, breaks 2"x 2" piece of wood.
2B30 Atmospheric Pressure
2B30.25Collapse 1 gallon metal can with vacuum pump.
2B30.30Magdeburg's hemispheres(cast iron) evacuated, can't be separated.
2B30.36Suction cup holds large mass suspended from heavy glass plate.
2B30.70Vacuum Cannon
2B35 Measuring Pressure
2B35.15Torricelli Barometer: Column of mercury in bell jar.
2B35.40Large model of aneroid barometer.
2B40 Density and Buoyancy
2B40.20Archimedes' principle: Cup and plug on balance beam.
2B40.30Cartesian divers: Pressure on cap sends divers sinking.
2B40.40The weight of air.
2B60 Siphons, Fountains, Pumps
2B60.60Hydraulic ram water pump, working model.