Coil for Demountable Transformer, 70mm, Model B Material_Cork Four 153 x 76mm plates

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

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

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

Pack of low-form borosilicate 3

and major vessels of the human heart

Coil for Demountable Transformer, 70mm, Model B Material_Cork Four 153 x 76mm platesInsulated 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.