Traditional metal working in Mexico one in silver, which represented the sun and moon respectively. The existence of gold and silver in Mexico was one of the main attractions for the Spanish in the New World, with the conquest of the Aztec Empire and subsequent exploration with the aim of finding more of these precious metals. Mining and metal working became a main aspect of the economy of colonial Mexico. Most of the emphasis was on the mining of gold, silver, copper, iron, lead, platinum and tin with much of the metal, especially gold, shipped to Spain. Initially, the working of metals in the new
What Is to Be Done? (novel) based on his own ideas of moral responsibility. Vladimir Lenin, however, found it inspiring and named a 1902 pamphlet "What Is To Be Done?". Lenin is said to have read the book five times in one summer, and according to Professor Emeritus of Slavic and Comparative Literature at Stanford, Joseph Frank, 'Chernyshevsky's novel, far more than Marx's "Capital", supplied the emotional dynamic that eventually went to make the Russian Revolution.' The novel mentions (in the 4th dream of Vera Pavlovna) aluminium as the "metal of the future". In fact aluminium became widely used only starting with World War I (1914).