Most of times the management of mining societies that operated on the island was set on criteria that could have been quietly defined as colonial; that is why very often these were confined to the exploitation of the richest parts of mined veins, transferring then out of Sardinia the mined material that was processed on plants located on the continent. The large proceeds coming from the exploitation of Sardinian mines were not invested again on the spot unless to ease the operation of the company. Sella's inquiry did not reveal the economic treatment inequities between Sardinian miners and those with a continental origin, not to mention the need to found a school for foundrymen and mining managers in Iglesias. The report ended with the recommendations that more capital should be invested to improve mining industry, first of all the emergency of building a road network between mines and of completing railways. The need of carrying out and developing an adequate telegraph communication network was also highlighted: Sella points out that the main mining companies demanded to be able to build, at their own expense, new telegraph lines in order to make communications faster. Such purpose was though made useless by the act that guaranteed the State the monopoly in the building of these important structures.