Spare Gilley Coils Set, 2-Piece, 4.5cm OD Subject_Earth Science Pivoted needle-style electroscope that swings

Pivoted needle-style electroscope that swings on its axis when a charge is applied

exposing the longitudinal and transverse components of wave motion mechanically

Designed to electrolyze water into separately collected hydrogen and oxygen

and commutator function from the inside out

Integrated diaphragm beneath an 8-inch heart model contextualizes cardiac position within the thoracic cavity during combined respiratory and cardiac teaching

Spare Gilley Coils Set, 2-Piece, 4.5cm OD Subject_Earth Science Pivoted needle-style electroscope that swingsReplacement pair of Gilley coils with a 1. 5cm inner and 4. 5cm outer diameter, sized to keep electromagnetism demonstrations running when the original coils wear out.