A feed of cases that cite 221 U.S. 229.
http://supreme.justia.com/
221 U.S. 2292007-12-13
http://supreme.justia.com/us/220/61/index.html
Lindsley v. Natural Carbonic Gas Co., 220 U.S. 61 (1911)1911-1-1
http://supreme.justia.com/us/209/349/index.html
Hudson County Water Co. v. McCarter, 209 U.S. 349 (1908)1908-1-1
http://supreme.justia.com/us/177/190/index.html
Ohio Oil Co. v. Indiana , 177 U.S. 190 (1900)1900-1-1
http://supreme.justia.com/us/161/519/index.html
Geer v. Connecticut, 161 U.S. 519 (1896)1896-1-1
http://supreme.justia.com/us/185/125/index.html
Kansas v. Colorado, 185 U.S. 125 (1902)1902-1-1
http://supreme.justia.com/us/206/230/index.html
Georgia v. Tennessee Copper Co., 206 U.S. 230 (1907)1907-1-1