Dr. Salvador E. Luria, microbiologist at the Massachusetts Institute of Technology, gave a three-day seminar at Marist, Vassar, and Dutchess Community College. On April 29th, he spoke at Marist on "Macromolecular Aspects of Biology." On April 30th, at Vassar, the topic of his lecture was "Genes and Viruses." On May 1st he lectured at Dutchess Community College on "Viruses and Abnormal Cell Functions."