
    Richard W. Beck, Jr., et al., on Behalf of Themselves and All Others Similarly Situated, et al., Appellants, v FMC Corporation et al., Respondents.
    Argued August 29, 1977;
    decided October 4, 1977
    
      
      Irving Fudeman for appellants.
    
      Sheldon Hurwitz and John J. Quackenbush, Jr., for FMC Corporation, respondent.
    
      Lawrence H. Wagner for Niagara Mohawk Power Corporation, respondent.
   Concur: Chief Judge Breitel and Judges Jasen, Gabrielli, Jones, Wachtler, Fuchsberg and Cooke.  