Siegfried Giedion, of Switzerland, one of the most eminent writers on modern architecture in Europe, will open his series of public lectures as Charles Eliot Norton Lecturer, tomorrow evening, in the Fogg Museum, at 8:30 o'clock. The topic of the first lecture will be "The Role of History Today."

Subsequent lectures by Giedion, held Tuesday evenings, will be: November 22, "Architectural Inheritance: Early Renaissance and Late Baroque;" November 29, "Architectural Inheritance; The Organization of Outer Space;" and December 13, "New Potentialities: Architecture and Construction."

Since 1928 Dr. Giedion has been the general secretary and leader of the International Congress of Contemporary Architecture. For the last three years he has been writing a study of the social background of modern times in relation to modern trends of building. He has traveled throughout Europe investigating the exact sources of all building questions, especially problems of social development following the introduction of the machine.