"Try this little sound experiment one winter evening. All you need is a glass plate or two, a violin bow and some fine sand."
C/U of sand being sprinkled onto a piece of glass. The violin bow is drawn down the side of the glass which makes it wobble and move the sand. The bow is applied to...
Experiments using electricity to shatter different kinds of materials.
A large power press crushes a tree trunk, a watch face and a riveted joint.
Footage of Scientist experimenting with coal dust in laboratories.
Machines which make "man-made lightning" are demonstrated.
Harmonograph recording two or more connected movements is presented at G.W.R Show.
Proposals for construction 'perpetual motion' machines - none of them works.
Road safety campaign for children in London.
Ghostly white shapes emerge against a black background - no soundtrack.