Mahlon Pitney, Hays v. Gauley Mountain Coal Company…
“ Mitchell Brothers Co., this day decided, since a conversion of capital often results in gain, the general purpose of the act of 1909 to measure the tax by the increase arising from corporate activities together with the income from invested property leads to the inference that that portion of the gross proceeds which represents gain or increase acquired after the taking effect of the act must be regarded as 'gross income' ”
