
    Nos. 687, 688, 689, 690.
    Cumberland Coal Co. v. Board of Revision of Tax Assessments; Phillips v. Same; Piedmont Coal Co. v. Same; and Greene County Coal Co. v. Same.
    
      No. 691.
    No. 692.
    
      No. 693.
    March 9, 1931.
    
      Messrs. William A. Seifert, Samuel McClay, W. J. Kyle, and Carl E. dock for petitioners.
    
      Mr. Ambrose Bradley for respondent.
   Petition for writs of certiorari to the Supreme Court of Pennsylvania granted.  