“ In determining what justice does require we have considered changes, either in fact or law, supervening since the judgment was entered and in such cases we have set aside the judgment and remanded the cause so that the state court might be free to act. ”

“ The condensed statement in the record leaves doubt as to the determination of the state court upon points bearing upon the federal question which that court has decided in upholding the preference. It does not clearly appear whether the court has determined that upon a segregation of assets there would be sufficient assets derived from the business done within the State of New York to pay the preferred claims, or whether that preference is to be satisfied out of assets resulting from operations in other States. ”