Professor C. S. Minot, who is now serving as the Harvard Austausch-Professor at Berlin, delivered from December 16 to 21 six lectures on "Modern Problems of Biology" before the University of Jena.

The subjects were:

1. "The new cell doctrine."

2. "Cytomorphosis."

3. "The doctrine of immortality."

4. "The development of death."

5. "The determination of sex."

6. "The conception of life."

The lectures were delivered before the university in the Aula and were attended by both students and professors. At the third lecture the Grand-Duke of Saxe Weimar was present in his official capacity as rector of the university. It was at his suggestion that the arrangement was made with the Prussian ministry of education by which the Harvard professor was to visit Jena, as an acknowledgement of the visit to America of Professor Eucken, who is a member of the philosophical faculty of Jena. It is the first time that an American exchange professor has served officially at any German university besides that at Berlin. Professor Minot's lectures were delivered in German and will be published shortly by the firm of Gustav Fischer.