Mahlon Pitney, Doyle v. Mitchell Bros Company…
“ There is no express provision that even allows a merchant to deduct the cost of the goods that he sells.Yet it is plain, we think, that by the true intent and meaning of the act the entire proceeds of a mere conversion of capital assets were not to be treated as income. Whatever difficulty there may be about a precise and scientific definition of 'income,' it imports, as used here, something entirely distinct from principal or capital either as a subject of taxation or as a measure of the tax; conveying rather the idea of gain or increase arising from corporate activities. ”
