Hand-Painted 3D Starfish Sectional Anatomical Model on Base, 18 x 16 inch Light & Optics_Spectroscopy Graphite lattice kit whose atoms

Graphite lattice kit whose atoms and connecting rods assemble into planar carbon sheets

Copper-block plug key switch with two 4mm terminals and a removable plastic-guarded plug

exposing the longitudinal and transverse components of wave motion mechanically

Used to produce concentric Newton's rings under monochromatic light

Used to determine irregular-object volumes by water displacement

Hand-Painted 3D Starfish Sectional Anatomical Model on Base, 18 x 16 inch Light & Optics_Spectroscopy Graphite lattice kit whose atomsThree dimensional starfish sectional model reveals echinoderm anatomy, water vascular system, and radial symmetry for marine biology teaching.