The strength of these forces was revealed when the February revolution of 1848 in Paris gave the signal for the outbreak of popular movements throughout Europe. The effect of the revolution in Vienna, involving the fall of Metternich (May 13) and followed by the nationalist movements in Hungary and Bohemia, was stupendous in Germany. Accustomed to look to Austria for guidance and material support, the princes everywhere found themselves helpless in face of the popular clamour. The only power which might have stemmed the tide was Prussia. But Frederick William's emotional and kindly temperament little fitted him to use "the mailed fist"; though the riot which broke out in Berlin on the 15th of March was suppressed by the troops with but little bloodshed, the king shrank with horror from the thought of fighting his "beloved Berliners," and when on the night of the 18th the fighting was renewed, he entered into negotiation with the insurgents, negotiations that resulted in the withdrawal of the troops from Berlin. The next day, Frederick William, with characteristic histrionic versatility, was heading a procession round the streets of Berlin, wrapped in the German tricolour, and extolling in a letter to the indignant tsar the consummation of "the glorious German revolution." German nationalism. Frankfort parliament. The collapse of the Prussian autocracy involved that of the lesser German potentates. On the 30th of March the federal diet hoisted the German tricolour and authorized the assembling of the German national parliament at Frankfort. Arrangements for this had already been made without official sanction. A number of deputies, belonging to different legislative assemblies, taking it upon themselves to give voice to the national demands, had met at Heidelberg, and a committee appointed by them had invited all Germans who then were, or who had formerly been, members of diets, as well as some other public men, to meet at Frankfort for the purpose of considering the question of national reform. About 500 representatives accepted the invitation. They constituted themselves a preliminary parliament (_Vorparlament_), and at once began to provide for the election of a national assembly. It was decided that there should be a representative for every group of 50,000 inhabitants, and that the election should be by universal suffrage. A considerable party wished that the preliminary parliament should continue to act until the assembly should be formed, but this was overruled, the majority contenting themselves with the appointment of a committee of 50, whose duty it should be in the interval to guard the national interests. Some of those who were discontented with this decision retired from the preliminary parliament, and a few of them, of republican sympathies, called the population of Upper Baden to arms. The rising was put down by the troops of Baden, but it did considerable injury by awakening the fears of the