The storm glass or chemical weather glass was an instrument which was proposed as a method for predicting weather. It consisted of a special liquid placed inside a sealed transparent glass. The state of crystallization within the liquid was believed to be related to the weather. The inventor is unknown but the device became popular in the 1860s after being promoted by Admiral Robert FitzRoy who claimed that “if fixed, undisturbed, in free air, not exposed to radiation, fire, or sun, but in the ordinary light of a well-ventilated room or outer air, the chemical mixture in a so-called storm-glass varies in character with the direction of the wind, not its force, specially (though it may so vary in appearance only) from another cause, electrical tension”. This activity can be developed individually by learners or as a pair activity (2 learners) that shall be focused on the positive use of the Fitzroy storm glass. Teacher shall maintain a close screw of the work performed by the learners.

Fitzroy Storm Glass

Sourcehttp://inhabitat.com)