Plumb needed laborers for his mines, but the Vermilion Coal Company was unable to afford European employment agents. Instead, it alerted steamship offices of the new job opportunities and convinced local railroads to carry notices of Streator's promise. Land was sold to incoming miners at discounted prices as another enticement, but the company retained mineral rights to the land. In 1870, Streator's population was 1,486, but by 1880 its population tripled. Scottish, English, Welsh, German and Irish immigrants came to the area first, followed later by scores of mostly Slovaks; Czechs, Austrians and Hungarians came in lesser numbers. Today many of the residents are direct descendants of these original miners. The success of the local mining operations and the introduction of the new glass making industry allowed for improvements in the living conditions and personal wealth of its miners and laborers. An 1884 survey by the Illinois Bureau of Labor Statistics showed that 20 percent of Streator's miners owned their houses. Labor movements like the Miners National Association and the United Mine Workers of America began to flourish, as did ethnic churches and social institutions such as the Masons and Knights of Pythias. In his 1877 History of LaSalle County, author H.F. Kett states: Perhaps no city...in Illinois, outside of the great city of Chicago, presents an instance of such rapid and substantial growth as the city of Streator. From a single small grocery house... the locality has grown to be a city of 6,000 prosperous and intelligent people. Churches, school-houses, large, substantial business houses and handsome residences, with elegant grounds and surroundings, now beautify the waste of ten years ago, while the hum of machinery and thronged streets are unmistakable evidences of business importance and prosperity. In addition to coal, the area around Streator contained rich clay and shale, which gave rise to Streator's brick, tile and pipe industries. In time, these supplanted coal as Streator's leading exports, but Streator was best known for its glass bottle industry. In the early 20th century Streator held the title of "Glass Manufacturing Capital of the World." Streator continued to flourish for much of the early 20th century. Ultimately the demand for coal was replaced with the growing needs for gas and oil. Many of the underground mines in Streator closed during the 1920s. The last of the mines shut down in 1958. While other areas of LaSalle County continued to grow,