issuance of an injunction to pre- vent multiple prosecutions. ) [24] The law applicable to th situa- tion here is clearly stated in Beal Mis- souri Pacific R. Corp. 312 U.S. 45, S.Ct. 418, 420, 85 LEd. 577, as follows: "ft is a familiar rule that courts of equity do not ordinarily restrain criminal prosecu- t