Laplace Law Demonstration Apparatus Capacity_50mL Rotary-knob resistance substitution board offering

Rotary-knob resistance substitution board offering twelve discrete values from 33 ohms to 10M ohms with 4mm lead connections

Built from two counter-rotating foil-sectored plates with a belt drive and a pair of Leyden-jar condensers

four-chamber stomach

Hand-painted skin cross-section enlarged 300 times exposes epidermal layers

Nine removable sections expose cortical hemispheres

Laplace Law Demonstration Apparatus Capacity_50mL Rotary-knob resistance substitution board offeringAluminium rail Laplace apparatus with a marked mobile bar that moves under 2. 5A of current, illustrating how current direction and field together produce force.