[150] Detroit Bank v. United States, 317 U.S. 329 (1943).

[151] Hurd v. Hodge, 334 U.S. 24 (1948).

[152] Thiel v. Southern Pacific Co., 328 U.S. 217 (1946).

[153] 323 U.S. 192 (1944).

[154] Ibid. 198, 199.

[155] Ibid. 208, 209. Cf. the following sentence from the concurring opinion of Justice Jackson in Railway Express Agency, Inc. v. New York, 336 U.S. 106, 112 (1949): "I regard it as a salutary doctrine that cities, states and the Federal Government must exercise their powers so as not to discriminate between their inhabitants except upon some reasonable differentiation fairly related to the object of regulation."

[156] 208 U.S. 161, 174 (1908).

[157] 313 U.S. 177, 187 (1941).

[158] 261 U.S. 525, 546 (1923).

[159] 300 U.S. 379, 400 (1937).