ixty-seven years after gold was discovered in California, the rush for the precious metal still raged at San Francisco’s Panama Pacific International Exposition in 1915, where exhibitors gave away gold nuggets. The South Africa’s Transvaal Chamber of Mines exhibit pictured here included a 60-foot-high Egyptian obelisk, gilded in gold and divided into sections representing how much of the mineral other countries produced. Next to the tower sat two gold-plated orbs, whose size relative to the obelisk’s sections demonstrated how much more of the blond ore the Transvaal pried from the earth.