Karst, Caves and Water Action Landform Model, 2-Part Subcategory_Brushes and a 10x eyepiece for

and a 10x eyepiece for fine-resolution measurement in classroom and research laboratories

midpiece with mitochondrial spiral

featuring a 20cm terrestrial globe with political boundaries and a graduated plastic meridian arc for map-reading work

Iron 1-inch diameter pendulum bob for periodic-motion experiments

Ten-centimeter brass cone on an ebonite insulator and metal base

Karst, Caves and Water Action Landform Model, 2-Part Subcategory_Brushes and a 10x eyepiece forTwo part karst landform model with a removable surface that exposes caves, stalagmites, stalactites, and an underground lake, mapping 32 keyed features across the subsurface.