Thanks to Dick Eastman for this notice:
" The California Digital Newspaper Collection offers over 200,000 pages of California newspapers spanning the years 1849-191l: the Alta California, 1849-1891; the San Francisco Call, 1893-1910; the Amador Ledger, 1900-1911; the Imperial Valley Press, 1901-1911; the Sacramento Record-Union, 1859-1890; and the Los Angeles Herald, 1905-1907. All the issues are available online and can be viewed on your computer.
"Additional years are forthcoming, as are other early California newspapers: the Californian; the California Star; the California Star and Californian; the Sacramento Transcript; the Placer Times; and the Pacific Rural Press."
You can find the collection at: http://cdnc.ucr.edu