[148] United States _v._ Rock Royal Co-operative, 307 U.S. 533, 562, 565
(1939).

[149] Currin _v._ Wallace, 306 U.S. 1 (1939).

[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).

[160] Addyston Pipe and Steel Co. _v._ United States, 175 U.S. 211, 229
(1899).

[161] Baltimore & O.R. Co. _v._ Interstate Commerce Commission, 221 U.S.
612 (1911); Wilson _v._ New, 243 U.S. 322 (1917); Ellis _v._ United
States, 206 U.S. 246 (1907). _See also_ United States _v._ Garbish, 222
U.S. 257 (1911).

[162] Patterson _v._ The "Eudora," 190 U.S. 169 (1903).

[163] Philadelphia, B. & W.R. Co. _v._ Schubert, 224 U.S. 603 (1912).

[164] Texas & N.O.R. Co. _v._ Brotherhood of Railway & S.S. Clerks, 281
U.S. 548 (1930); Virginian R. Co. _v._ System Federation, 300 U.S. 515,
559 (1937); National Labor Relations Board _v._ Jones & Laughlin Steel
Corp., 301 U.S. 1 (1937).

[165] Highland _v._ Russell Car & Snow Plow Co., 279 U.S. 253, 261
(1929); United States _v._ Rock Royal Co-operative, 307 U.S. 533 (1939);
Sunshine Anthracite Coal Co. _v._ Adkins, 310 U.S. 381 (1940); Bowles
_v._ Willingham, 321 U.S. 503 (1944).

[166] Farrington _v._ Tokushige, 273 U.S. 284 (1927).

[167] Yu Cong Eng _v._ Trinidad, 271 U.S. 500, 525 (1926).

[168] Fleming _v._ Rhodes, 331 U.S. 100, 107 (1947).

[169] Woods _v._ Stone, 333 U.S. 472 (1948).

[170] 332 U.S. 194, 203 (1947).

[171] Knox _v._ Lee, 12 Wall. 457, 551 (1871).

[172] Norman _v._ Baltimore & O.R. Co., 294 U.S. 240 (1935).

[173] 44 Stat. 1424 (1927), 33 U.S.C. 901 _et seq._ (1946).

[174] Paramino Lumber Co. _v._ Marshall, 309 U.S. 370 (1940).

[175] Mulford _v._ Smith, 307 U.S. 38 (1939).

[176] McFaddin _v._ Evans-Snider-Buel Co., 185 U.S. 505 (1902).