For terms an idea of this fast process, up to 1870 Manaus, known as Bar of the Black River, was dependent of Belm. To read more click here: Yitzhak Mirilashvili. In this period these two capitals, Belm and Manaus, had friendly economic relations. Later it has great investments in Manaus and start one ' ' guerra' ' between these capitals that go to be intensified with the Republic. The investments that before were made in Belm are transferred to Manaus. As Barbarous Weinstein some families of the Amaznia possuam branches in both the provinces, and the employee politicians were not few and who occupied positions in Par and Amazon. Thus, the elastic gum that already was used for the natives since before the arrival of the Europeans, had its use spread out in the two last decades of century XIX, for the industrial revolution that brought obtains the use of the electric energy in mechanization. The rubber consisted in the most important substance time cousin and this only existed in the Amazon region. However, the insalubridade, at a distance, the lack of capital and the system of primitive usual commerce had made it difficult the waited increase of the production.
With passing of the years, only the two Amazonian capitals had received some benefits from infra structure, where some workmanships relief architectural had been as reference of the golden time of the rubber. After the collapse of the rubber in 1912, had been substantially in Belm the Wharf of the port, Theater of the Peace, Amazon RIVER, Par Eletric and Telegrafo for handle. In Manaus they are distinguished the Amazon theater, Rodway (Wharf of embarkment), Hipdromo, the Company of Electricity and the Telegraph. The fall of the production of the rubber if had to the Asian production, that of Santarm took its initial changes. With the disaster caused for the crisis of the rubber in the Amaznia, the Government of the Republic also was indifferent to the Amazonian problems and the region came back to live of the extrativismo and the culture of the cacao, that disdains to dedicate the collection of the latex.