In our last we chronicled the success of "Uncle Tom's Cabin," at the NATIONAL, when performed to an audience composed of the rougher specimens of humanity. During the last week quite a change has been noticeable in the audiences. The theatre has been crowded every evening by very intelligent audiences, among whom ladies greatly predominated. It is certain that "Uncle Tom" is attracting to the National a class of visitors not commonly seen in our theatres. It is a pity that they should be seen so rarely; but, as long as managers are so short-sighted as to believe that oaths, double entendres and indecent plots are attractive to the public, they must expect that many who would delight in the stage as a "school of morals," will shun it when they are taught offensively by shameless actors and careless managers that it is a "school of immorals." If theatrical managers only had a proper idea of their interests, they would soon deprive carping censure of every argument upon which to found an assertion that "the theatre is the nursery of vice."

  "Uncle Tom's Cabin" will be played all this week.