The best performance of the service of transportation by rail requires
the fullest possible co-ordination of the different parts of our
transportation system and the largest attainable measure of
co-operation among the agents who perform the service. Section 4 of
the act of 1887 and the law of July, 1890, as far as the latter
relates to railways, are based on an unsound theory. Provision having
been made for that kind and measure of governmental regulation of
railway rates that will insure reasonable charges, the railways should
be permitted to co-operate in rate-making and be given power to pool
their competitive business.