Wimshurst Machine, 250mm Diameter (Discontinued) Subcategory_Geology Models Twelve-position rotary capacitance substitution box

Twelve-position rotary capacitance substitution box selecting one capacitor at a time

and prism table for measuring wavelengths and the refractive indices of solids and liquids

Twice life-size longitudinal section reveals nasal cavity

demonstrating how a crane lifts loads through the mechanical advantage of a large wheel turning a small axle

Wimshurst Machine, 250mm Diameter (Discontinued) Subcategory_Geology Models Twelve-position rotary capacitance substitution boxDiscontinued 250mm Wimshurst machine with transparent counter rotating plates, two Leyden jars, and an ABS base, retained for legacy reference and parts compatibility.