Metallic-spiral hygroscope, by Mithoff, Germany. Used at Melbourne Observatory.

A hygroscope measures the amount of moisture in the atmosphere

Physical Description

Painted black metal with dial and a glass cover. There is a free arm that holds the dial and the metal cover. The arm has holes where the unit was attached to (possibly) a wall. Wooden display/backing board painted cream colour with screw holes where Hygroscope was attached.

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