Metropolitan Edison Co. v. Federal Power Commission

I think that I should make plain in what respects my opinion is in accord with or differs from that of the majority in the case at bar.

In August, 1935, the Pennsylvania Public Service Commission commenced investigations of the petitioners and certain other Pennsylvania corporations to ascertain facts in respect to their operating expense accounts and whether or not penalties should be imposed for certain alleged infractions of the Pennsylvania Utility Law. Certain phases of the investigation apparently could not be conducted’ adequately under the law of Pennsylvania and, at the request of the…