It’s what’s on the outside that matters, according to one engineer of the 1893 World’s Fair. That’s because most buildings for the Columbian Exposition were designed to be temporary and constructed using a coating of staff—a mixture of plaster and jute fiber—applied to metal and steel frames and creating superficial appearance of white marble. The excerpt below comes from Joseph Kendall Freitag’s article “The World’s Fair Buildings” in the November 1891 issue of Engineering Magazine. The byline for this [...]