lwaukee Social Democratic Pub. Co. _v._
Burleson, 255 U.S. 407 (1921).

[209] St. Joseph Stock Yards Co. _v._ United States, 298 U.S. 38 (1936);
Denver Union Stock Yards Co. _v._ United States, 304 U.S. 470 (1938).

[210] 320 U.S. 591 (1944). The result of this case had been foreshadowed
by the opinion of Justice Stone in Federal Power Commission _v._ Natural
Gas Pipeline Co., 315 U.S. 575, 586 (1942) to the effect that the
Commission was not bound to the use of any single formula or combination
of formulas in determining rates.

[211] 320 U.S. 591, 602, 605 (1944).

[212] American Telephone & Telegraph Co. _v._ United States, 299 U.S.
232 (1936); United States _v._ New York Telephone Co., 326 U.S. 638
(1946); Northwestern Electric Co. _v._ Federal Power Commission, 321
U.S. 119 (1944).

[213] Valvoline Oil Co. _v._ United States, 308 U.S. 141 (1939);
Champlin Refining Co. _v._ United States, 329 U.S. 29 (1946).

[214] Isbrandtsen-Moller Co. _v._ United States, 300 U.S. 139, 146
(1937).

[215] St. Louis S.W. Ry. Co. _v._ United States, 245 U.S. 136, 143
(1917).

[216] Akron C. & Y.R. Co. _v._ United States, 261 U.S. 184 (1923).

[217] Dayton-Goose Creek R. Co. _v._ United States, 263 U.S. 456, 481,
483 (1924).

[218] Chicago, I. & L.R. Co. _v._ United States, 270 U.S. 287 (1926).
_Cf._ Seaboard Air Line R. Co. _v._ United States, 254 U.S. 57 (1920).

[219] United States _v._ Berwind-White Coal Mine Co., 274 U.S. 564, 575
(1927).

[220] United States ex rel. Attorney General _v._ Delaware & Hudson Co.,
213 U.S. 366, 405, 411, 415 (1909).

[221] United States _v._ Lowden, 308 U.S. 225 (1939).

[222] Louisville & N.R. Co. _v._ Mottley, 219 U.S. 467 (1911).

[223] Chicago, R.I. & P.R. Co. _v._ United States, 284 U.S. 80 (1931).

[224] Railroad Retirement Board _v._ Alton R. Co., 295 U.S. 330 (1935).

[225] United States _v._ Bennett, 232 U.S. 299, 307 (1914).

[226] Cook _v._ Tait, 265 U.S. 47 (1924).

[227] Helvering _v._ Lerner Stores Corp., 314 U.S. 463, 468 (1941).

[228] Brushaber _v._ Union P.R. Co., 240 U.S. 1, 24 (1916).

[229] McCray _v._ United States, 195 U.S. 27, 61 (1904).

[230] Treat _v._ White, 181 U.S. 264 (1901).

[231] Flint _v._ Stone Tracy Co., 220 U.S. 107 (1911).

[232] National Paper & Type Co. _v._ Bowers, 266 U.S. 373 (1924).

[233] Billings _v._ United States, 232 U.S. 261, 282 (1914).

[234] Steward Machine Co. _v._ Davis, 301 U.S. 548 (1937); Helvering
_v._ Davis,