Swinging the lead.
Location of events unknown.
L/S of naval warship, seagulls fly above. Diagrams show relative size of oceans and continents. Diagrams show how lead was swung over the side to test the depth of the water. Various diagrams show how the more modern echo sounder works....
Excellent investigation of the difference between straight hair and curly.
Slow motion footage of a speed typist.
Item showing manufacture and use of certain gases.
A look at how atoms form molecules to make up things like salt and ice.
A look at how lenses in the eye and camera work.
A look at the role of shadows in life.
A look at a 14 inch home-made telescope and how it works.