Baron Gerard De Geer, famous Swedish geologist at the University of Stockholm, will give an illustrated lecture on "Geochronological Methods and Plans" in the Geological Lecture Room of the University Museum at 8 o'clock tonight. The lecture will be open to the public.

Baron De Geer is world famous as the first to devise a method for measuring in years the length of the latest geological period, which hitherto could be judged but relatively. He is also well-known for his map of the formation of the earth's crust and for his studies of the characteristics and movements of the ancient glaciers of North-western Europe. The former is still useful today and was the best map for many years after its publication in 1892.

With his wife and two assistants, Baron De Geer has traveled through Canada, New York State and New England during the past months studying these regions to determine the number of years since the glacial period in the country, using the same methods as he employed in Europe.