WEATHER BALL

Based on an idea by Johann Wolfgang von Goethe, this classic glass storm-glass barometer shows changes in air pressure quickly and clearly: as the pressure varies, the coloured liquid rises or falls in the spout. All accessories to colour the liquid are included. A beautiful, hands-on way to explore atmospheric pressure at home or in the classroom.

Table standing, 120 × 104 × 180 mm. Sun/clouds symbols.