Whenever Mr. Koussevitzky waves his baton, the world of vagabonds comes to attention, and follows the rest of the world to Symphony Hall. Tonight Mr. Koussevitzky will lead the Boston Symphony Orchestra in the fourth concert of the Monday evening series.

The Second Symphony of Brahms in D major will be feature number of the program, Bach's "Brandenburg Concerto No. 3 in G major" will open the evening, and among the other numbers listed are the Prelude to Wagner's Lohengrin", and "La Valse", the choreographic poem by Ravel, famous French composer.

With such entertainment to close the day, one looks about for academic pastime for the morning and afternoon. At 12 o'clock in Robinson Hall, Professor Conant will speak to Fine Arts 3b on "Roman Temples". Augustus found Rome of brick and left it of marble, and much of his building activity was devoted to carving shrines to the gods. Contrasted with the pure spirituality of the Greek temples, the religious structures seem the product of a more decadent age, but nevertheless, they offer to the eye and mind of a sympathetic student a subject worthy of some little attention.

Other lectures of interest are:

10 O'clock

"Radical and Conservative Conceptions of Natural Law", Mr. O. H. Taylor, Emerson F. Economics 7b.

11 O'clock

"Mid-Century America", Professor Schlesinger, New Lecture Hall, History 32b.

12 O'clock

"The Problem of Interstimulation and the So-called Group Mind", Professor Carver, Sever 17, Economics 8.