O-Ring Belt Replacement for Van de Graaff Generator, Single Subject_Astronomy Built to demonstrate the diverging-lens

Built to demonstrate the diverging-lens eyepiece pioneered by Galileo

supporting reproductive biology teaching

Jumbo honey bee life cycle model demonstrates complete metamorphosis

Paintable and stainable wooden hockey stick supports DIY finishing for display

the weak triprotic acid used as a pH-control agent in food-chemistry and as a chelating agent in metal-ion solutions

O-Ring Belt Replacement for Van de Graaff Generator, Single Subject_Astronomy Built to demonstrate the diverging-lensReplacement Van de Graaff O ring belt sized for the PH0918A and PH0919A generators, the consumable wear part that transfers charge between the drive wheel and the high voltage dome.