This Age of Magnetism by O. R. Frisch, f.r.s.
Jacksonian Professor of Natural Philosophy in the University of Cambridge
During the past decade, magnetism has assumed a new importance in many fields: these range from its application in devices such as tape-recorders and memory ' cores ' for computers, through new studies of the movements of the continents which can be deduced from the magnetism of the rocks, to the role magnetism is seen to play in stars and nebulae.