Owen J. Roberts, Schuylkill Trust Company v. Pennsylvania…
“ Prior to the year 1907, Pennsylvania trust companies were liable for what is known as a capital stock tax, levied upon the corporation. In the administration of that form of exaction certain securities, such as United States bonds and national bank shares, are eliminated from tax by deduction of their value from the value of the total assets of the corporations which own them. The deduction of exempt securities is made to avoid double taxation; the theory being that the shares issued by a corporation and its capital stock are identical so that taxation of the one is taxation of the other. ”
