Mahlon Pitney, Newark Natural Gas Fuel Company v…
“ Plaintiff in error operates under a franchise granted by a city ordinance passed February 21, 1898, for a term of twenty-five years, which permitted a rate of 25 cents per thousand for a period of ten years from its passage, but within that period the company voluntarily introduced a net rate of 18 cents and maintained it for some years prior to the adoption of the ordinance of 1911. ”
