In 1850 the newspaper tax and the postage were assimilated--that is to say, newspapers were subjected only to one tax, and payment of that tax secured the right of transmission by post. The tax was at the rate of 5 centimes per sheet of 72 square decimetres or less for newspapers published in the departments of Seine and Seine-et-Oise, and 2 centimes for those published elsewhere. All newspapers on which a tax of 5 centimes was paid, were entitled to free transmission by post throughout France. Those on which a tax of 2 centimes was paid, were entitled to free transmission by post within the department in which they were published and the adjoining departments. In order to obtain transmission by post throughout France, an additional sum of 3 centimes per paper must be paid on these latter newspapers.[362] The Minister of Justice, in introducing the measure in the National Assembly, explained that it would serve a double purpose: on the one hand it would give an increase of revenue of some six millions a year; and on the other it would safeguard society against detestable doctrines, because it would fall specially on those evil newspapers and books[363] which were circulated at a low price in town and country, propagating prejudices and error, exciting the passions and corrupting the conscience of the public.[364] Louis Napoleon Bonaparte, in 1852, desirous that there should be no obstacle in the way of his ultimate assumption of absolute power and the Imperial crown, issued a decree further restricting the Press in France. The publication of newspapers or periodicals dealing with political or economic questions, unless authorized by the Government, was forbidden; and the rates of postage in force prior to the law of 1850 were imposed on newspapers, in addition to the tax imposed by that law.[365] The same principles led to the discrimination introduced in 1856 between political and non-political papers. The former were subjected to a higher rate of postage than newspapers of a non-political character, because the Government felt it to be necessary that there should be some moderating influence to check the effect of political journals in times of intense political excitement, and adopted this expedient.[366]