Varied schools of music will be introduced by the Boston Symphony orchestra in its concert at Sanders Theatre tonight. Beethoven, the classicist, Brahms, the romanticist, and Moussorgsky, the modernist, will be represented on the program.

The climactic number, the Fourth Symphony by Brahms, is charged with an emotional power that makes it well-suited for the conclusion of a repertoire that is at the start descriptive and interpretative. The emotional fire of this composition in E minor never Mazes into a lurid display nor dies down to lukewarm embers, but always remains at a steady white heat. The musical skill and energetic orchstration that marks Brahms symphonic work is especially apparent in this Fourth composition.

The concert, conducted by Serge Kenssevitsky, will start at 8 o'clock this evening.

Lectures of interest today are:

10 O'CLOCK

"The Variation Form." Professor Spalding Music Building, Music 4.

12 O'CLOCK

"Transitional and Early French Gothie Buildings." Professor Edgell. Robinson Hall, Fine Arts 4a.