This series contains publications, glass plate negatives, correspondence, and other material from the Citrus Experiment Station (CES). Dr. Webber was the first director of the station and there are items in this series related to his time there. These include memorandums to staff and annual reports about CES projects. Notable items include copies of the 1915 California State Assembly bills authorizing funding for the new Citrus Experiment Station. The CES changed locations in 1918, and items from the original Rubidoux Mountain location and the location that would become the University of California, Riverside are included.