The American Medical Association has digitized the entire archive of JAMA & Archives journals. The JAMA & Archives Backfiles are a singularly rich, full-text digital resource that includes every issue of JAMA and the specialty Archives Journals dating back to the first issue of JAMA published in July 1883. Fully integrated into the JAMA & Archives web sites, the Backfiles deliver more than 1.7 million pages-every article, every image-into the digital age. Each article has been carefully scanned and digitally optimized, allowing readers to explore the Backfiles using sophisticated searches and a host of additional online research tools
http://www.backfiles.org/