Coil for Demountable Transformer, 70mm, Model B Material_Cork Barlow's Wheel apparatus with neodymium

Barlow's Wheel apparatus with neodymium magnets and a heavy base

and major vessels of the human heart

exposing the triangular rotor's epitrochoidal motion with a lamp-lit ignition point

Four 153 x 76mm plates - each holding 98 iron-rod plotting compasses in a 14 x 7 matrix - assemble flat or as the faces of a cube to display 2D and 3D field-line patterns

and visceral organs in a combined lab-ready model

Coil for Demountable Transformer, 70mm, Model B Material_Cork Barlow's Wheel apparatus with neodymiumInsulated bobbin coil for the demountable transformer with 4mm panel sockets and an enclosed earth pin, used in step up and step down ratio demonstrations of Faraday's law.