Burco, Incorporated. Nos. 3983 and 3991, in circuit court of appeals for 4th circuit, no. 3983, Burco, Inc., v. J. B. Whitworth et al., on appeal to superintend and revise, in matter of law, proceedings of district court for district of Maryland, at Baltimore, in bankruptcy; no. 3991, [same] v. [same], appeal from district court for district of Maryland, at Baltimore, in bankruptcy; brief submitted by United States and by Securities and Exchange Commission, amici curiae.