This apparatus is used to demonstrate 'Brownian' or random motion of smoke particles. A specially designed plastic box, with a sliding lid, contains a glass smoke cell, a cylindrical 'Whitley Bay' pattern condensing lens and a low voltage festoon bulb. The components are pre-adjusted so as to focus the light at the correct height in relation to the smoke cell, ensuring that observation is enhanced.
Flanged box for microscope stage mounting
Hole in lid for microscope viewing access
Includes a squeeze bottle for use as a smoke generator