Dr. Jacob Bronowski, who a year ago took up the deputy directorship of the Salk Institute in California, discusses with Tom Rosenthal his new activities and how he feels about working in the golden West. The recent total eclipse of the sun was probably the most closely studied ever. With special film from the Pacific, Horizon examines what was done and why. For the first time deaf children can see a visual pattern of their own attempts at speech. In the programme a new machine is shown which may revolutionize the teaching of speech and language to these handicapped children.