Memory enhancement study: An article in the Feb. 9 Section A about a research trial testing whether deep brain stimulation would boost memory said that the technique is being used for patients with epilepsy and that the subjects of the study were candidates for the treatment. It should have said that the technique is being used only experimentally with epilepsy patients, and that the study subjects were not undergoing the treatment but were being prepared for surgery.
Solar energy: An article in the Feb. 5 Section A about the wide-ranging effects of large-scale solar energy projects said that the ratepayer advocate's office of the California Public Utilities Commission had estimated that customers would be charged 50% more for energy derived from renewable sources. The PUC itself, not the advocate's office, reported that the price of renewable power more than doubled between 2003 and 2011. It did not estimate the cost to customers.
Horse racing: A column in the Feb. 9 Sports section about jockey Mike Smith approaching 5,000 wins said that Smith had won the Breeders' Cup Classic aboard Drosselmeyer at Belmont Park. The race was at Churchill Downs.