A feed of cases that cite 238 U.S. 21.
http://supreme.justia.com/
238 U.S. 212007-12-13
http://supreme.justia.com/us/195/345/index.html
Birkett v. Columbia Bank, 195 U.S. 345 (1904)1904-1-1
http://supreme.justia.com/us/226/170/index.html
Miller v. Guasti, 226 U.S. 170 (1913)1913-1-1
http://supreme.justia.com/us/238/41/index.html
Mallinckrodt Chemical Works v. Missouri ex Rel. Jones, 238 U.S. 41 (1915)1915-1-1