US$ 5850.00
sized for pool
5 inches thick
Heavy-duty 500-piece teacher molecular model set with 230 atoms and 270 bonds
Shows oxygenated and deoxygenated blood paths between heart chambers and alveolar surfaces through seven hand-painted removable parts designed with medical-professional input
armature winding
Pith Ball Electroscope Research Lab sized for poolTwo pith balls suspended on unspun silk from a brass pillar, fanning apart visibly when a charged rod approaches to demonstrate electrostatic repulsion and induction.
US$ 5850.00
US$ 325.00
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