Combinations of dislocations

An early black and white silent film demonstrating the combination of dislocations within a bubble raft model.

The film shows a bubble raft model up close, highlighting areas of dislocations and gaps in the structure. It demonstrates that as a bubble raft is compressed, these areas of dislocation move in order to repair the overall structure of the model. It goes on to demonstrate crystal boundaries and recrystallization of the bubble raft model.

This film is likely to be an exert from a longer film on bubble rafts, possibly made in the 1940s -1950s by Lawrence Bragg.

For this film, and several others in our collection, we have tried to contact any known copyright holders and believe it to be an orphan work. If you are the rights holder, would like it to be taken down, or have any more information, please get in touch at

More from the Bragg archive