"PARKWAY PLASTICS, INC."

Employs Guericke’s Method for Demonstrating the Force of Atmospheric Pressure.

Hands on demomstration showing the power of a vacuum.

The Student Double-Wall Calorimeter is an inexpensive necessity for your experiments.

The Student Coin and Feather Tube shows the two items in a vacuum, falling at the same rate.

The High rpm Steam Engine features an electrically-heated horizontal boiler.

Radiometer with four lightweight metal arms.

Ideal for studying heat and thermodynamics.

Great Intro For Solar Energy!