
    No. 453.
    No. 495.
    No. 510.
    No. 522.
    In re Alker, International Association of Machinists, AFL-CIO, et al. v. Central Airlines, Inc., Texas Carbonate Co. v. Phinney, District Director of Internal Revenue, United States District Court for the Western District of Oklahoma et al. v. Lutes et al.,
   ante, p. 923;

ante, p. 934;

ante, p. 940; and

ante, p. 941.

Petitions for rehearing denied.  