New York, United States of America.
Introductory intertitle reads: "A new electrocardiograph picks up pulsations in a remarkable demonstration."
A woman stands in a radio studio in front of a microphone device. A man standing beside her asks if she is ready to have her heartbeats...
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.