The New International Encyclopædia…
“ The Pittsburg coal district, embracing an area of 14,000 square miles, is the richest coal field in the world. It is from the excessive consumption of coal in its mills and furnaces that Pittsburg derives its sobriquet, “The Smoky City.” As a manufacturing city Pittsburg is best known, and until recent years it possessed all of the unattractive characteristics of such a community. Recently, however, great progress has been made, and fine streets, splendid boulevards, a system of parks, costly residences, and other evidences of municipal and civic pride have come into existence. ”
