Various, Popular Science Monthly (1886)
“ So a lower class of freight at a rate of one half a cent, instead of being carried at a loss, or at the expense of the originally established traffic, would not only pay the additional expense incurred in its transportation of one third of a cent, but a profit also of one sixth of a cent per ton per mile. This small rate of profit multiplied by many tons may become a greater sum than the higher rate applied to its smaller tonnage. ”
