Karst, Caves and Water Action Landform Model, 2-Part Type_Geographical Twelve-piece brass slotted mass set

Twelve-piece brass slotted mass set spanning 1 to 500 grams

Nine removable sections expose cortical hemispheres

Wall-mounted Mason's hygrometer with two identical dual-scale thermometers — one dry and one kept wet via a water reservoir — calculating relative humidity from their paired reading difference

the smallest size in the series for pendulum and small-scale collision experiments where a compact projectile mass is needed

Designed to generate and detect ultrasonic waves above the audible range

Karst, Caves and Water Action Landform Model, 2-Part Type_Geographical Twelve-piece brass slotted mass setTwo part karst landform model with a removable surface that exposes caves, stalagmites, stalactites, and an underground lake, mapping 32 keyed features across the subsurface.