Magnetism part 3

The story of magnetism continues with another set of vivid demonstrations.

Lawrence Bragg first describes and contrasts the two classes of magnetic bodies – ferro-magnetics and para-magnetics – and demonstrates the relationship between magnetic properties and temperature. He discusses the Earth’s magnetism and illustrates Wegener’s novel theory of the history of the continents. In a series of vivid demonstrations Lawrence shows how more recent knowledge of magnetism has fully validated Wegener’s theory.

 

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