Page "Herbert Hoover" Paragraph 17

In 1908 Hoover became an independent mining consultant, traveling worldwide until the outbreak of World War I in 1914.

His lectures at Columbia and Stanford universities were published in 1909 as Principles of Mining, which became a standard textbook.

Hoover and his wife also published their English translation of the 1556 mining classic De re metallica in 1912.

This translation from the Latin of Renaissance author Georgius Agricola is still the most important scholarly version and provides its historical context.

It is still in print.