The Age of the Railroads Transcontinental Railroad completed in 1869; By 1890.... Working for the Railroad Extremely difficult and dangerous, Mostly done by.... Railroad Time US- four time zones Working for the Railroad Extremely difficult and dangerous, Mostly done by.... Railroad Time US- four time zones Andrew Carnegie Immigrated... Worked for... Bought ________________ in new companies Becomes the owner of __________________________ Business Strategies Vertical Integration Buy out all your suppliers ________________ and ____________ mines