at have been sustained in specific decisions are the following: a
provision penalizing shippers for obtaining transportation at less than
published rates, Armour Packing Co. _v._ United States, 209 U.S. 56
(1908); the so-called "commodities clause" of the Hepburn Act of June
29, 1906, construed as prohibiting the hauling of commodities in which
the carrier had at the _time of haul_ a proprietary interest, United
States _v._ Delaware & H. Co., 213 U.S. 366 (1909); a provision of the
same act abrogating life passes, Louisville & N.R. Co. _v._ Mottley, 219
U.S. 467 (1911); a provision of the same act authorizing the Commission
to regulate the entire system of bookkeeping of interstate carriers,
including intrastate accounts, Interstate Commerce Commission _v._
Goodrich Transit Co., 224 U.S. 194 (1912); the "long and short haul"
clause of the Interstate Commerce Act, United States _v._ Atchison, T. &
S.F.R. Co. (Intermountain Rate Cases), 234 U.S. 476 (1914); an order of
the Commission establishing the so-called uniform zone or block system
of express rates, American Express Co. _v._ South Dakota ex rel.
Caldwell, 244 U.S. 617 (1917); an order of the Commission directing the
abandonment of an intrastate branch of an interstate railroad, Colorado
_v._ United States, 271 U.S. 153 (1926); an order of the Commission
fixing rates of a transportation company operating solely in the
District of Columbia, on the ground that its carriage of passengers
constituted part of an interstate movement, United States _v._ Capital
Transit Co., 338 U.S. 286 (1949).

[388] United States _v._ Ohio Oil Co. (Pipe Line Cases), 234 U.S. 548
(1914).

[389] _See also_ State Corp. Commission _v._ Wichita Gas Co., 290 U.S.
561 (1934); Eureka Pipe Line Co. _v._ Hallanan, 257 U.S. 265 (1921);
United Fuel Gas Co. _v._ Hallanan, 257 U.S. 277 (1921); Pennsylvania
_v._ West Virginia, 262 U.S. 553 (1923); Missouri ex rel. Barrett _v._
Kansas Natural Gas Co., 265 U.S. 298 (1924).

[390] Public Utilities Com. _v._ Attleboro Steam and Electric Co., 273
U.S. 83 (1927). _See also_ Utah Power & Light Co. _v._ Pfost, 286 U.S.
165 (1932).

[391] 49 Stat. 838.

[392] The Natural Gas Act of 1938, 52 Stat. 821.

[393] 315 U.S. 575 (1942).

[394] Ibid. 582. Sales to distributors by a wholesaler of natural gas
which is delivered to it from an out-of-State source are subject to the
rate-making powers of the Federal Power Commission. Colorado-Wyoming Co.
_v._ Comm'n