This apparatus allows students to study the motion and behaviour of molecules in gases.

An electric motor running at 4 to 12V DC vibrates a small platform inside a transparent tube, so that a number of small steel balls is vibrated violently inside the tube.

An increase in the violence of the vibration simulates an increase in gas temperature and an increase in the weight of the 'float' simulates an increase in gas pressure.

• Demonstrates kinetic gas theory
• Supplied with balls and 2 floats
• Includes instruction manual
• CE approved
• Eisco type PH0203

The Whitley Bay smoke cell is used for the observation of 'Brownian' or random motion in smoke particles.

It consists of a box with flanges that allow it to be easily attached to a standard microscope. The box contains a smoke cell, a cylindrical condensing lens and a 12V, 3W festoon bulb. The apparatus is pre-set to focus the light at the correct height.

• Supplied with detailed instructions and a squeeze bottle type smoke generator
• 4mm electrical connections
• Box dimensions 90 x 46 x 20mm
• Eisco type PH0203B