Magnetic Field Demonstrator with Long Solenoid, Acrylic Frame Lab Equipment and Supplies_Audio Visual Equipment accepting rods up to three-quarters

accepting rods up to three-quarters of an inch for positioning apparatus at any angle

Adjustable iris from closed to a 30mm maximum aperture inside a 3-inch black metal body

Tirrill burner on a stable octagonal base adds air

Square-topped wooden screw simple-machine model with a leverage block

and edge-polished

Magnetic Field Demonstrator with Long Solenoid, Acrylic Frame Lab Equipment and Supplies_Audio Visual Equipment accepting rods up to three-quartersLong solenoid coil of 1. 5mm copper wire on a 5 x 4. 5 x 2. 75 inch acrylic frame with 4mm sockets, exposing the cylindrical field pattern that distinguishes a solenoid from a single loop.