For demonstrating electric fields between various electrodes. Liquid paraffin is placed in
the 90mm dia. Petri dish and semolina or fine grass seed is sprinkled on the surface. Various
electrode configurations can be arranged in the liquid and when a high voltage is applied
via the 4mm terminals the field pattern is generated. The see-through base allows the
pattern to projected via an overhead projector system. Supplied without paraffin or semolina.

Note. This apparatus requires a safe, lowcurrent limited 0 – 5kV EHT supply.