Item title reads - Soil-less crops! A farming revolution.
New Jersey College of Agriculture. America (USA).
M/S of a man planting a tomato seedling in a pot of sand. M/S as water, which includes elements from soil, is poured from a test tube into a glass bottle through a funnel....
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.