PBS
Pbs: American Experience: Chicago: City of the Century: Philip Armour
From a PBS American Experience series about Chicago, this biography of Philip Armour, who made the meat-packing business more efficient. Find out about his methods, but also about the horrible conditions of the meat-packers who worked in...
US National Archives
Nara: American Originals: Meat Packing House Inspections
Check out this National Archives and Records Administration site for a short explanation of the term "muckraker," and for a quote by Sinclair, whose writings influenced the passage of the Meat Inspection Act in 1907.