Electrophorus Demonstration Subject_Zoology Wooden wheel-and-axle simple-machine model on

Wooden wheel-and-axle simple-machine model on a 9

Large-scale typical flower model with removable floral parts and a bisected ovary showing internal ovule arrangement for detailed botany instruction

Single-channel aluminum 1-meter bench with engraved graduations and leveling-screw feet

Four-part plant cell model lifts chloroplast

Life-size muscular skeleton model features painted muscle origins

Electrophorus Demonstration Subject_Zoology Wooden wheel-and-axle simple-machine model onDemonstration electrophorus with a 9cm aluminum disc, insulating handle, and rubber footed plastic base, capable of producing repeated sparks once the base is charged by friction.