Parliamentary crowds present most of the characteristics common to heterogeneous crowds that are not anonymous--The simplicity of their opinions--Their suggestibility and its limits--Their indestructible, fixed opinions and their changed opinions--The reason of the predominance of indecision--The role of the leaders--The reason of their prestige--They are the true masters of an assembly whose votes, on that account, are merely those of a small minority--The absolute power they exercise--The elements of their oratorical art--Phrases and images--The psychological necessity the leaders are under of being in a general way of stubborn convictions and narrow-minded--It is impossible for a speaker without prestige to obtain recognition for his arguments-- The exaggeration of the sentiments, whether good or bad, of assemblies-- At certain moments they become automatic--The sittings of the Convention--Cases in which an assembly loses the characteristics of crowds--The influence of specialists when technical questions arise--The advantages and dangers of a parliamentary system in all countries--It is adapted to modern needs; but it involves financial waste and the progressive curtailment of all liberty--Conclusion. In parliamentary assemblies we have an example of heterogeneous crowds that are not anonymous. Although the mode of election of their members varies from epoch to epoch, and from nation to nation, they present very similar characteristics. In this case the influence of the race makes itself felt to weaken or exaggerate the characteristics common to crowds, but not to prevent their manifestation. The parliamentary assemblies of the most widely different countries, of Greece, Italy, Portugal, Spain, France, and America present great analogies in their debates and votes, and leave the respective governments face to face with identical difficulties. Moreover, the parliamentary system represents the ideal of all modern civilised peoples. The system is the expression of the idea, psychologically erroneous, but generally admitted, that a large gathering of men is much more capable than a small number of coming to a wise and independent decision on a given subject. The general characteristics of crowds are to be met with in parliamentary assemblies: intellectual simplicity, irritability, suggestibility, the exaggeration of the sentiments and the preponderating influence of a few leaders. In consequence, however, of their special composition parliamentary crowds offer some distinctive features, which we shall point out shortly.