Ida Tarbell,
The History of the Standard Oil Company…
(1904)
“ A.—If in any calendar month either party shall gather more than its said percentage of said aggregate of crude petroleum gathered, as gathering is herein defined, it shall pay to the other party on the quantity gathered in excess of its said percentage an amount per barrel equal to three-fourths of the then current full rate per barrel charged for collecting and delivering crude petroleum in the oil-producing regions—commonly called local pipage ”
