
    No. 910.
    No. 961.
    Allied Chemical & Alkali Workers of America, Local Union No. 1 v. Pittsburgh Plate Glass Co., Chemical Division, et al.; and National Labor Relations Board v. Pittsburgh Plate Glass Co., Chemical Division, et al.
   C. A. 6th Cir. [Certiorari granted, 401 U. S. 907.] Motion of National Council of Senior Citizens to file a brief as amicus curiae granted.  