The Jungle By g vegas Mar 1, 1872 yellowstone park www.google.com/yellowstone park/ Jan 1, 1903 elkins act www.google.com/elkins act/ Jan 1, 1906 meat inspection act www.google.com/meat inspection act/ Feb 25, 1906 The Jungle www.google.com/The Jungle/ Jun 30, 1906 pure food and drug act www.google.com/pure food and drug act