Owen J. Roberts, Schuylkill Trust Company v. Pennsylvania…
“ The inability of a State to measure a tax by certain assets exempted by federal law does not preclude it from reckoning in the tax base all those it can reach. And the principle of equal protection does not demand that because one company owns wholly exempt securities, with consequent exemption of its shareholders from the exaction, the State shall abstain from taxing the shareholders of another company whose investments carry no such exemption. ”
