"PARKWAY PLASTICS, INC."

Spare color filter set to be used with Light Box and Optical Set.

Mounted polaroid sheets.

Plastic wave apparatus ideal for studying wave behavior.

Sturdy stroboscope ideal for studying periodic motion.

Provides electronically controlled waves.

Small electromagnet to demonstrate the concept of electromagnetism.

Demonstrates static magnetic fields.

Leyden jars for static electricity activities.

Ideal for experiments with electrostatic principles.

Accessories for electrostatic generators.

Plug switch for electric circuits.

Plug switch for electric circuits.

Ideal for introducing electronics.

Kits for demonstrating thermal energy and heat transfer.

Ideal for variety of electronic experiments.

Demonstrates process of energy conversion.