Opinions. 7-13. Cumberland Coal Company vs. Board of Revision of Tax Assessments in Greene County, Pa.; [same] vs. [same]; [same] vs. [same]; [same] vs. [same]; Henry A. Phillips vs. [same]; Piedmont Coal Company vs. [same]; Greene County Coal Company vs. [same], on writs of certiorari to Supreme Court of Pennsylvania; Nov. 23, 1931. n. p.