The law Mitre 1907 established a new railway policy, which basically consisted of railways operated by private companies, mainly British, and they are profitable to remunerate the capital and to continue to invest in the system. The law of gave some advantages to companies but established intervention rates where profitability reached certain index over three years. So for the calculation of the rate of return was essential to fix the capital invested by the companies. The railway Bureau was the body responsible for the task. The study of capital began in 1908 and advanced until 1910. 1911 And 1912 exercises developed into a discussion of items that should be excluded, and from there, there was no interest neither the Government nor the com...