Corrections and Clarifications
In "Cornell leads battle of the B factories" (News, 27 Aug., p. 1111) by Faye Flam, two erroneous statements were attributed to Burton Richter, director of the Stanford Linear Accelerator Center. Synchrotron radiation is a concern in B factory design not because it can throw the beam off course but because it heats the vacuum chamber walls. And the use of superconductors in radio-frequency cavities is, contrary to the article, not an untried innovation. Both errors were Science's, not Richter's.