[872] Essex v. New England Teleg. Co., 239 U.S. 313 (1915).

[873] Pensacola Teleg. Co. v. Western U. Teleg. Co., 96 U.S. 1 (1878).

[874] Western Union Teleg. Co. v. Richmond, 224 U.S. 160 (1912). See also Postal Teleg. Cable Co. v. Richmond, 249 U.S. 252 (1919).

[875] Northwestern Bell Teleph. Co. v. Nebraska State R. Com., 297 U.S. 471 (1936).

[876] Bell Tel. Co. v. Pennsylvania Public Util. Com., 309 U.S. 30 (1940).

[877] Missouri ex rel. Barrett v. Kansas Natural Gas Co., 265 U.S. 298 (1924).

[878] Public Utilities Com. v. Attleboro Steam & Electric Co., 273 U.S. 83 (1927).

[879] Pennsylvania Natural Gas Co. v. Public Serv. Com., 252 U.S. 23 (1920); Public Utilities Com. v. Landon, 249 U.S. 236 (1919).

[880] Panhandle Eastern Pipe Lines Co. v. Public Serv. Com., 332 U.S. 507 (1947).

[881] Panhandle Co. v. Michigan Comm'n., 341 U.S. 329 (1951).