De Magnete, published in 1600 in England, is commonly recognized as the first publication of any sort which employs modern scientific principles. It is also the first treatise on geophysics. The author, William Gilbert (1540-1603), was considered to be England's most distinguished scientist during the Elizabethanera. He was physician to the queen, andhe researched electricity and magnetism. His descriptions of magnets and of the Earth's magnetic field as a centered dipole are accurate, and the word electricity derives from his work. Gilbert also brought the Copernican theory of planetary motion to England. Originally in Latin, De Magnete was translated into English by P. Fleury Mottelay (Dover Publishers, New York, 1958).