Excellent tool for viewing magnetic fields.

• Comprised of a transparent plate with small circular chambers
• Each chamber contains an iron rod; each functions independently as a plotting compass
• Transparent- suitable for overhead projectors

Comprising of a transparent plate having a matrix of small circular chambers, each chamber containing an iron rod and functioning independently with as a plotting compass. This plate is an excellent tool to view magnetic fields and due to its transparent nature is suitable for OHPs.