Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.
In the caption of the photograph accompanying the Perspective"Genetic networks" by W. F. Loomis and Paul W. Sternberg (4Aug., p. 649), the name of the sculpture should have been givenas "Mozart I," and the sculptor, Kenneth Snelson, should havebeen mentioned.