An early educational film demonstrating the creation of bubble rafts and how they can represent the structure of a metal.
The concept of bubble raft modelling was first presented by Lawrence Bragg and John Nye of the Cavendish Laboratory. Legend claims that Bragg conceived of bubble raft models while pouring oil into his lawn mower. He noticed that bubbles on the surface of the oil assembled into rafts resembling the plane of close-packed crystals.
This film was made by the Kodak Research Laboratory in Middlesex. It demonstrates the construction of a bubble raft, the geometry of a dislocation within a bubble raft and the compression of a single ‘crystal’ between parallel plates. It highlights each of the stages with the use of a photograph of a bubble raft which can be turned to various angles in order for the viewer to see any dislocations, ‘slip planes’ and formations of defects such as holes in the structure.
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