Siphon Barometer

A Low Cost, Simple Barometer Yet Having Sufficient Accuracy. The Whole Column Of Mercury Is Clearly Visible In The Glass Tube. Barometer Scale Is Graduated, One Side From 23 - 31 Inch And Another Side 580 - 790Mm. Vertical Sliding Zero Point Adjustment Is Carried By A Screw Clamp Attached To The Glass Tube. Complete Apparatus Mounted On A Polished Wooden Board. Supplied Without Mercury. (Siphon Barometer)