Leyden Jar Gifts_Science Gifts a compound unit for demonstrating

a compound unit for demonstrating multi-rope mechanical advantage in physics activities

Aluminum-handled collecting net swings lightweight through tall grass and air sweeps for classroom field trips and introductory entomology sampling work

Designed to project narrow beams through interchangeable slit plates

Six-lens optics set of three double-convex and three double-concave glass lenses with ground beveled edges

and vascular tissue at greatly magnified scale

Leyden Jar Gifts_Science Gifts a compound unit for demonstratingReproduces Ewald von Kleist's 1745 charge storage device with concentric metal cups around a plastic dielectric, used to demonstrate capacitance and the discharge of stored static charge.