757 F2d 901 United States v. Koopmans  757 F.2d 901  17 Fed. R.
Evid. Serv. 986  UNITED STATES of America, Plaintiff-Appellee,
Kathy KOOPMANS, Defendant-Appellant. UNITED STATES of America,
Plaintiff-Appellee, Douglas HENRY, Defendant-Appellant.  Nos.
83-3200, 83-3201.  United States Court of Appeals, Seventh
Circuit.  Argued Oct. 5, 1984. Decided March 18, 1985.  Thomas
D. Sykes, Asst. U.S. Atty., John R. Byrnes, U.S. Atty., Madison,
Wis., for plaintiff-appellee.  Susan J.M. Bauman, Thomas,
Parsons, Schaefer & Bauman, Madison, Wis., for defendants-
appellants.   ESCHBACH, Circuit Judge.   In these consolidated
appeals by codefendants convicted of introducing marijuana into
a federal prison in violation of 18 U.S.C. Sec. 1791 and 28
C.F.R. Sec. 6.1, we are asked to decide whether the Attorney
General unlawfully delegated his authority in adopting 28 C.F.R.
Sec. 6.1, whether a certain hearsay statement is admissible
under the co-conspirator exception to the hearsay rule, whether
the testimony of a government ex